Casio Pro Trek PRG-340 vs Garmin Epix Gen 2 Sapphire Smartwatch
Weight and specs compared for 2026 — and which one to choose.
AMOLED multisport GPS watch with 16-day battery, sapphire edition. 1.3" always-on display, 65-hour GPS tracking, built-in maps.
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Casio Pro Trek PRG-340 vs Garmin Epix Gen 2 Sapphire Smartwatch: which should you buy?
If saving weight is your priority, the Casio Pro Trek PRG-340 wins — at 66 g it is 4 g (6%) lighter than the Garmin Epix Gen 2 Sapphire Smartwatch (70 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest electronics page, or browse the full gear weight database.