Samsung Galaxy Watch 8 (40mm) vs Amazfit T-Rex 3
The Samsung Galaxy Watch 8 (40mm) and the Amazfit T-Rex 3 are priced $20 apart — $299.99 versus $279.99 — close enough that the choice between them comes down to features, not budget.
The Samsung Galaxy Watch 8 (40mm) offers a 1.31" display, 2 days of typical battery life, built-in GPS, 5ATM+IP68 water resistance.
Global reference price
The Amazfit T-Rex 3 brings a 1.5" display, 27 days of typical battery life, built-in GPS, 10ATM water resistance to the table.
Global reference price
Specification Comparison
Key Differences
The Amazfit T-Rex 3 lasts noticeably longer between charges — 27 days versus 2 — which matters most for multi-day trips or anyone who dislikes daily charging routines. Screen size also favors the Amazfit T-Rex 3, at 1.5" versus the Samsung Galaxy Watch 8 (40mm)'s 1.31", making it easier to read notifications and metrics at a glance.
Pros & Cons
Samsung Galaxy Watch 8 (40mm)
Pros
- Built-in GPS
Cons
- Shorter battery life (2 days)
- Smaller 1.31" display
- Costs a bit more
Amazfit T-Rex 3
Pros
- Much longer battery life (27 days)
- Larger 1.5" display
- Lower price
- Built-in GPS
Cons
- No significant weakness versus the alternative at this price
Which One Is Right For You?
- Samsung Galaxy Watch 8 (40mm): A good fit for buyers who prefers Samsung's ecosystem and design.
- Amazfit T-Rex 3: Makes the most sense for anyone who wants to charge as infrequently as possible, prefers a larger, easier-to-read display and wants to spend a little less.
Conclusion
Neither watch is a strict downgrade from the other — each wins on a different practical dimension, so the right pick depends on which of those matters more day to day.
Summary
Samsung Galaxy Watch 8 (40mm)
Strengths
- Built-in GPS
Weaknesses
- Shorter battery life (2 days)
- Smaller 1.31" display
- Costs a bit more
Amazfit T-Rex 3
Strengths
- Much longer battery life (27 days)
- Larger 1.5" display
- Lower price
- Built-in GPS
Weaknesses
- No significant weakness versus the alternative at this price
There's no universal winner here — match the pick to whichever tradeoff (battery life, screen, or connectivity) actually applies to daily use.