Apple

I love both watches. But for training Garmin ( mine Tactix 7 pro )is always my choise. Bigger screen, better app and algorithms. Offline gps whitout any need to purchase or subscription. Touch screen is very poor while training outdoors. While swimming ultra has very poor gps and water lock makes very complicated to switch data pages and commands. Battery life has no comparison. MIL display is not so cool but you can train and hiking for very long time. Otherwise Ultra is very cool for everyday use. Looks good at booth work and formal event and oblivious in spare time. Is good if you have a recreative running or some Kind of sport. Also you can switch an infinite numbers of wrist band. It’s also smaller and much light than my garmin. I think for me habit is a factor. I’d start training many years ago with garmin and switch to ultra is very difficult.