Fenix 7 does not have the amoled screen. The Epix and 965 do and once you have seen it, you wont want anything less!
I have the 965 and its excellent. Have had many variations of the trialthlon/multi sport Garmins, since the 305, and they just get better and better. No faults and nothing to complain about. writs based HR is never great for really sweaty activities, so I use a chest strap for them. Running/footy/mtb is fine with wrist though. Its basically the same as the 955, but with the amoled screen. Yes, I know gps improved, slightly bigger screen, prob more activities and health stats, but main features the same – music, garmin pay, excellent mapping. Battery lasts approx 2 weeks without gps activities. 1 week with.