Why is Garmin Fenix 6S better than Garmin Fenix 5S? Monitors blood oxygenation levels? Has branded damage-resistant glass? 11h longer battery life - GPS? 25h vs 14h Has a temperature sensor? 21.2% higher resolution? 240 x 240px vs 218 x 218px Has irregular heart rate warnings? Has a cadence sensor? Has NFC? Scroll down for more details The price was $169 CAD which was about $130 USD. The fenix 5/5s is $329 CAD now, which is just above $250 USD. To me, unless the VA4 can run 2x longer on one charge, I would go for old version. My only thought is that the new and shiny things tend to have bugs that may or may not be worked out over time. The Fenix and Vivoactive are two very different lines. The Fenix is the top of the line, while the Vivo are more middle, here's a comparison. The Fenix gives you more training stats, heart rate, PAcePro, tons of outdoor features and biking, plus some swimming. Both have sleep tracking, body battery, and SpO2. Tracks distance. Garmin Fenix 6S. Garmin Forerunner 735XT. It tracks how far you travel. Measures pace. Garmin Fenix 6S. Garmin Forerunner 735XT. Measuring pace shows how much time it takes to travel one kilometer or one mile. For example, in running, a 4 minute kilometer would be a very good pace. Lower battery life than F6s. Also not as nice clock displays. And then of course the bulls quality. The F6s is much nicer (I have the F6s sapphire DLC). So to me in direct comparison, the 745 is quite a downgrade. You may have a better fit with 745 since it noticable lighter. But it's not by much, so you may also not notice. is dustproof and water-resistant. Garmin Fenix 6S. Garmin Forerunner 255S. The device is dustproof and water-resistant. Water-resistant devices can resist the penetration of water, such as powerful water jets, but not being submerged into water. sweat resistance. Garmin Fenix 6S. F6 is significantly larger/heavier than the 645M. It is something that shouldn't be too difficult to get used to but it is worth being aware of. I went for the 6 rather than the 6S as I wanted the bigger screen and better battery life. The new widget view is good. The default watch faces on the F6 don't particularly appeal to me and I wish they Looking at the Garmin spec pages for each, wrist circumference recommendations clearly show the difference: Fenix 5s with silicone band: 145-217 mm; Fenix 6s with silicone band: 108-182 mm; Fenix 5 with silicone band: 163-249 mm; Fenix 6 with silicone band: 125-208 mm; Fenix 5x with silicone band: 163-250 mm; Fenix 6x with silicone band: 127-210 mm Fenix 6 series at given size will have a fair bit better GPS-tracking battery life (5S per what Garmin says lasts up to 14 hours). This pretty much matters only if you do very long continuous activities like ultramarathons and such. All variants in series 5 have 1.2 inch screen while series 6 has 1.2/1.3/1.4 inch screens depending on watch size The type of technology used in the display. Watch band is replaceable. Garmin Epix Gen 2. Garmin Fenix 6S. The watch band is removable and can be replaced by any standard watch band of the correct size, allowing you to customise it to your liking. has a touch screen. Garmin Epix Gen 2. QyanK.