Side-by-side comparison of specifications and features
Compare visual case presence and physical footprint on one shared wrist. Measure your top-down wrist width for a stronger result; lug-to-lug is used when the catalog has it.
Medium (6.7″)
Estimated top width: 56.7 mm
Preliminary range: 54.7–61.8 mm.
Watch A
Visual presence
BoldCase covers 75% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 5.3 mm per side.
Watch B
Visual presence
BoldCase covers 71% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 6.0 mm per side.
Proportional guide only: visual presence and physical footprint do not predict comfort. Weight, thickness, caseback shape, rigid lugs, strap stiffness, wrist-bone prominence, wearing tension, bezel design, and case curvature change how a watch actually wears. Non-round silhouettes use a verified family shape and catalog dimensions where available; missing case height or width is estimated from a conservative family aspect ratio.
Start with the specifications that meaningfully differ. Expand the complete table for reference details and missing-data context.
| Specification | Seiko 5 Sports GMT | Tissot PRX Powermatic 80 |
|---|---|---|
| Pricing | ||
| MSRP5 Sports GMT is $295 less at MSRP | $400 | $695 |
| New Price5 Sports GMT is $259 less based on the current snapshot | $570 | $829 |
| Used Price (Low)5 Sports GMT is $278.7 less at the low end | $283 | $562 |
| Used Price (High) | $616 | $1,245 |
| 30-Day Trend | ↓ -10.6% | ↓ -1.9% |
| Used Price Range | $283 - $616 | $562 - $1,245 |
| Identity | ||
| Style | Sports, Tool | Sports, Dress |
| Dimensions | ||
| DiameterPRX Powermatic 80 is 2.5mm smaller | 42.5mm | 40mm |
| ThicknessPRX Powermatic 80 is 2.7mm thinner | 13.6mm | 10.9mm |
| WeightPRX Powermatic 80 is 23g lighter | 161g | 138g |
| Lug to Lug | 46mm | 44.6mm |
| Case | ||
| Crystal | Hardlex | Sapphire Crystal |
| Bezel | Bidirectional 24-hour | Fixed |
| Dial | ||
| Dial Color | Black | Blue |
1 field is excluded from the differences view because one watch lacks comparable data. Use “All specs” to inspect those gaps.
This Seiko 5 Sports GMT vs Tissot PRX Powermatic 80 comparison is less about a universal winner and more about wrist presence versus easier fit, entry price versus premium finishing or specs. Treat it as a value-versus-upgrade decision — confirm the extra spend solves a problem you will notice every week.
Bottom line
Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features. Choose Seiko 5 Sports GMT if you prefer more dial presence and a larger case feel; choose Tissot PRX Powermatic 80 if you want a smaller case footprint on the wrist.
Choose Seiko 5 Sports GMT when
Seiko 5 Sports GMT is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, sports styling.
Choose Tissot PRX Powermatic 80 when
Tissot PRX Powermatic 80 is a better fit for smaller wrists, mechanical-watch enthusiasts, sports styling.
Movement and upkeep
Seiko 5 Sports GMT: automatic movement
Tissot PRX Powermatic 80: automatic movement
Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.
Size and wearability
Seiko 5 Sports GMT: 42.5mm · L2L 46mm · 161g
Tissot PRX Powermatic 80: 40mm · L2L 44.6mm · 138g
Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features.
Water resistance
Seiko 5 Sports GMT: 100m
Tissot PRX Powermatic 80: 100m
Water resistance is similar on paper, so focus on fit, features, and price instead.
Price and value
Seiko 5 Sports GMT: $400
Tissot PRX Powermatic 80: $695
There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.
Style and use case
Seiko 5 Sports GMT: sports
Tissot PRX Powermatic 80: sports
Both lean into a similar sports use case — the choice is more about fit, features, and price than category.
Crystal and materials
Seiko 5 Sports GMT: Hardlex crystal · steel
Tissot PRX Powermatic 80: sapphire crystal · steel
Crystal choice can change long-term wear expectations — one may prioritize scratch resistance while the other keeps cost or vintage feel in check.
Seiko 5 Sports GMT is often the value play at current pricing, while Tissot PRX Powermatic 80 makes more sense if you will use its extra features regularly.
There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.
Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.
Prices change often, so compare the latest listings and condition options before you buy.
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Seiko 5 Sports GMT
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Tissot PRX Powermatic 80
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Tissot PRX Powermatic 80 — it is 44.6mm lug-to-lug versus 46mm, and lug-to-lug is what decides whether a watch overhangs a smaller wrist.
They are rated the same, so water resistance will not decide this. Choose on strap material and how much you mind scratching the case.
Seiko 5 Sports GMT is the value pick at roughly $295 less. Pay more only if a specific difference above matters to you — otherwise the cheaper one is the smarter buy. Confirm live listings, since marketplace pricing moves.
Evidence & Method
This page currently relies on normalized catalog fields and calculated differences. No external reviewer observation is used in its verdict.
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