The Tissot PRX Powermatic 80 is the default recommendation in the affordable Swiss automatic segment, and for good reason. It is a well-made watch from a brand with genuine heritage. But "default" and "smartest buy" are not always the same thing, and the Soren Momentis competes directly with it on specifications while costing less.
This is an honest, spec-by-spec comparison. The PRX has real advantages, and this guide names them plainly. But so does the Momentis, and by the end you will know exactly which one is the smarter buy for you.
Soren Momentis vs Tissot PRX: The Quick Answer
Both are Swiss Made automatic watches aimed at the same buyer. The core differences come down to price, power reserve, and design.
The Soren Momentis is €625 to €655, runs the Sellita SW200-1 at 28,800 bph, and is sold direct. The Tissot PRX Powermatic 80 is around €775, runs the Powermatic 80 with an 80-hour power reserve, and is sold through retailers.
The PRX wins on power reserve and on brand heritage. The Momentis wins on price, on the smoother high-beat movement, and on direct service. If the 80-hour reserve and an established name matter most to you, the PRX earns its premium. If you want the same Swiss Made quality with a smoother sweep for around €120 to €150 less, the Momentis is the smarter buy. Here is the full breakdown.
Price and What's Actually Included
The price gap is the first real difference.
The Momentis is €625 on the 3-link bracelet and €655 on the 5-link. The Tissot PRX Powermatic 80 is around €775 through authorised retailers. That is a difference of roughly €120 to €150 for two watches aimed at the same buyer.
Both come with a 2-year warranty, though Soren extends this to 4 years for SOREN Circle members. Both arrive properly packaged. The Momentis includes free EU shipping, a 30-day return period, a wooden presentation box, and a warranty card registered to you. The key point on price is not just the lower number but what sits behind it: the Momentis is not cheaper because it cuts corners on the watch, as the specifications below show. It is cheaper because of how it is sold, which is covered further down.
Movement: Sellita SW200-1 vs Powermatic 80
This is where the two watches make genuinely different choices, and honesty requires giving the PRX its due.
The Tissot PRX uses the Powermatic 80, which has one clear advantage: an 80-hour power reserve. That is roughly double the Momentis. Take a PRX off on Friday and it will still be running well into the following week. The Momentis, running the Sellita SW200-1, offers 38 to 41 hours, a little over a day and a half. This is a real, practical advantage for the PRX, and it should not be glossed over. If you take your watch off for whole weekends or rotate between watches, the longer reserve genuinely matters.
But the Powermatic 80 gets that reserve by running at 21,600 bph (3 Hz), a lower beat rate than the Momentis. The Sellita SW200-1 runs at the full 28,800 bph (4 Hz), which gives a noticeably smoother, more fluid seconds sweep. So the trade is real in both directions: the PRX buys a longer reserve at the cost of a less fluid sweep, and the Momentis keeps the traditional high-beat sweep at the cost of a shorter reserve.
It is also worth noting Soren's answer to the reserve gap. Sellita's SW200-2 Power+ raises the reserve to 65 hours while keeping the full 28,800 bph, closing most of the gap without the beat-rate compromise. As Sellita transitions production, that is the direction the movement moves in.
Both movements are Swiss Made, both are reliable, and both will last decades with servicing.
Design and Case Comparison
The two watches take different design approaches, and this is largely a matter of taste rather than quality.
The Momentis is a 40mm case in solid 316L stainless steel, with a fluted bezel and a choice of 3-link or 5-link bracelet. Its design language is clean and classic, versatile across casual and formal settings, and it reads as a traditional everyday automatic.
The Tissot PRX is built around an integrated bracelet design, where the bracelet flows directly into the case without separate lugs, referencing the sport-luxury watches of the 1970s. This integrated look is the PRX's defining visual feature and a large part of its appeal. It is a more specific, more fashion-forward aesthetic.
Both are 40mm, both use sapphire crystal, and both are well finished. The choice here is purely about which look you prefer: the Momentis's classic versatility or the PRX's integrated, retro-sport character. Neither is objectively better; they are different styles for different tastes.
Where You Buy It: Direct vs Retail
This is the structural difference that explains the price gap.
Tissot, founded in 1853, sells through a wide network of authorised dealers, jewellers, and boutiques. This gives the PRX real advantages: you can walk into a shop and try it on, the brand carries over 170 years of heritage and recognition, and there is an established second-hand market. These are genuine benefits, and for some buyers they justify the price.
But that retail network has a cost. Each dealer and distributor takes a margin, and Tissot's marketing and sponsorship spending is built into the price. A meaningful portion of the €775 pays for distribution and brand, not the watch itself.
Soren sells direct. The watch goes from the Swiss manufacturer to you, with no retailer margin and no distributor markup. This is the entire reason the Momentis can offer the same Swiss Made standard at a lower price: you are paying for the watch, not the retail chain. This is Soren's core brand promise, and this comparison is exactly where it plays out. The broader version of this argument is in the independent brand versus Tissot guide.
Who Should Buy the Momentis, and Who Should Buy the PRX
Here is the honest buying advice, based on what you prioritise.
Buy the Tissot PRX if the 80-hour power reserve is important to you, you want the heritage and recognition of a brand established in 1853, you prefer the integrated bracelet aesthetic, or you value being able to try the watch in a shop and the reassurance of an established resale market. These are real reasons, and the PRX delivers on them.
Buy the Soren Momentis if you want the same Swiss Made quality for around €120 to €150 less, you prefer the smoother 28,800 bph seconds sweep, you value direct service from the founder rather than a dealer network, or you simply want the most watch for your money. For the buyer who cares about what the watch is rather than whose name is on it, the Momentis is the smarter buy.
Both are legitimate Swiss Made automatics. The decision comes down to whether the PRX's longer reserve, heritage, and integrated design are worth the premium to you, or whether the Momentis's lower price, smoother movement, and direct model matter more.
FAQ
Is the Tissot PRX a good first automatic watch?
Yes, it is a sound first automatic. It is Swiss Made, has an 80-hour power reserve, sapphire crystal, a distinctive integrated design, and the reassurance of an established brand you can try in a shop. The main consideration is price: at around €775, it costs more than some equally well-specified alternatives like the Soren Momentis. As a first automatic from a recognised name, though, it is a reliable and appealing choice.
Does Soren offer the same water resistance as the Tissot PRX?
Yes, closely. The Tissot PRX Powermatic 80 offers 100 metres (10 ATM) of water resistance, and the Soren Momentis also offers 10 ATM (100 metres), suitable for daily wear and swimming. If you want higher water resistance, Soren's Oceanic offers 30 ATM (300 metres) as a genuine dive watch. For everyday wear, the Momentis and the PRX are matched on water resistance.
Which has the better warranty?
Both offer a 2-year warranty as standard. Soren extends this to 4 years for SOREN Circle members, which gives the Momentis an edge on warranty length for those who join. Both warranties cover manufacturing defects and the movement. Soren's warranty detail is covered in full in the warranty guide.
What is the main difference between the Momentis and the PRX?
Three things: price, movement, and design. The Momentis is around €120 to €150 cheaper, runs a smoother 28,800 bph movement with a 38 to 41 hour reserve, and has a classic versatile design. The PRX costs more, runs a 21,600 bph movement with a longer 80-hour reserve, and has an integrated sport-luxury design. Both are Swiss Made.
Is the Momentis a good alternative to the Tissot PRX?
Yes, it is one of the most direct alternatives. It matches the PRX on Swiss Made certification, sapphire crystal, 40mm size, and 10 ATM water resistance, offers a smoother seconds sweep, and costs less because it is sold direct. The PRX's advantages are its longer power reserve, its heritage, and its integrated design. If those are not priorities for you, the Momentis delivers equivalent quality for less.
Why is the Momentis cheaper if it's the same quality?
Because Soren sells directly to the buyer without a retail chain. Tissot sells through dealers and distributors, each taking a margin, and funds a large marketing and sponsorship budget, all of which is built into the price. Soren removes those layers, so more of the price goes into the watch itself rather than the distribution network. The lower price reflects the business model, not a compromise on the watch.
The Bottom Line
The Tissot PRX Powermatic 80 and the Soren Momentis are both genuine Swiss Made automatics competing for the same buyer. The PRX wins on power reserve with its 80 hours, on heritage as a brand since 1853, and on its distinctive integrated design, for around €775. The Momentis wins on price at €625 to €655, on its smoother 28,800 bph movement, and on direct service, delivering the same Swiss Made standard for less.
The honest conclusion: if the longer reserve, the heritage, and the integrated look are worth the premium to you, the PRX is a fine choice. If you want equivalent Swiss Made quality with a smoother movement for around €120 to €150 less, the Momentis is the smarter buy. Same Swiss standard, lower entry price, because of how it is sold. That is the whole case.
Free EU shipping. 2-year warranty. 30-day returns. Swiss Made. sorenwatches.com
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