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
CompactCase covers 49% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 11.8 mm per side.
Watch B
Visual presence
ModerateCase covers 51% of your modeled wrist width.
Physical footprint
Clear spaceEstimated clearance: 11.7 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.
Start with the specifications that meaningfully differ. Expand the complete table for reference details and missing-data context.
| Specification | Seiko 5 Sports | Seiko Quartz |
|---|---|---|
| Pricing | ||
| MSRPQuartz is $215 less at MSRP | $350 | $135 |
| New PriceQuartz is $31.7 less based on the current snapshot | $290 | $258 |
| Used Price (Low)5 Sports is $2.1 less at the low end | $143 | $145 |
| Used Price (High) | $390 | $816 |
| 30-Day Trend | ↑ +3.1% | ↑ +14.5% |
| Used Price Range | $143 - $390 | $145 - $816 |
| Identity | ||
| Style | Sports, Casual | Dress, Casual |
| Dimensions | ||
| Diameter5 Sports is 1mm smaller | 28mm | 29mm |
| Thickness | 11.2mm | N/A |
| Movement | ||
| Movement | Automatic | Quartz |
| Case | ||
| Water Resistance5 Sports adds 50m water resistance | 100m (recreational diving) | 50m (swimming) |
| Dial | ||
| Dial Color | Black | White |
| Luminous5 Sports includes luminous markers | ✓ Included | Not included |
3 fields are excluded from the differences view because one watch lacks comparable data. Use “All specs” to inspect those gaps.
Seiko 5 Sports 28mm and Seiko Quartz SUR315 can look close on a spec sheet, yet the tradeoffs that matter most are usually mechanical feel versus low-maintenance convenience, wrist presence versus easier fit, water-ready utility versus dressier everyday wear. Start with fit first — case width and lug-to-lug usually matter more than secondary features if wrist comfort is a concern.
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 28mm if you prefer a mechanical watch experience and do not mind more upkeep; choose Seiko Quartz SUR315 if you want a lower-maintenance daily watch.
Choose Seiko 5 Sports 28mm when
Seiko 5 Sports 28mm is a better fit for mechanical-watch enthusiasts, sports styling.
Choose Seiko Quartz SUR315 when
Seiko Quartz SUR315 is a better fit for low-maintenance daily wear, dress styling.
Movement and upkeep
Seiko 5 Sports 28mm: automatic movement
Seiko Quartz SUR315: quartz movement
Seiko 5 Sports 28mm uses a automatic movement, while Seiko Quartz SUR315 uses a quartz movement — that changes day-to-day ownership, upkeep, and the overall feel on the wrist.
Size and wearability
Seiko 5 Sports 28mm: 28mm · L2L 33.1mm · 69g
Seiko Quartz SUR315: 29mm
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 28mm: 100m
Seiko Quartz SUR315: 50m
Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.
Price and value
Seiko 5 Sports 28mm: $290
Seiko Quartz SUR315: $135
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 28mm: sports
Seiko Quartz SUR315: dress
Seiko 5 Sports 28mm leans more sports, while Seiko Quartz SUR315 pulls toward dress use case — pick the one that matches how you will actually wear it.
Crystal and materials
Seiko 5 Sports 28mm: Hardlex crystal · steel
Seiko Quartz SUR315: Hardlex crystal · steel
Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.
Seiko Quartz SUR315 is often the value play at current pricing, while Seiko 5 Sports 28mm 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
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Seiko Quartz
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Quartz and solar models are usually easier for grab-and-go use, while automatic and manual watches appeal more to buyers who enjoy the mechanical side of watch ownership.
Neither is clearly smaller: case width is 28mm vs 29mm. Pick on strap and looks instead — the size difference is not what will decide this for you.
Seiko 5 Sports 28mm — it is rated 100m versus 50m, which is the difference between swimming confidently and only handling splashes.
Seiko Quartz SUR315 is the value pick at roughly $155 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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