I have both watches 🫣
My experience during winter here in Denmark 🇩🇰, i prefer the Garmin. The physical buttons (when wearing gloves) is easier to press. I wear the watch on the jacket and use a HRM strap.
Navigation wise - Garmin is way ahead. You can be in a totally unfamiliar place, make a route on the watch (no need for a phone) and go for a run. I use that mainly on holidays in different countries.
I also find the Garmin to be more accurate. For example when I run in a group, and I wear my Apple Watch, and doing intervals with my running club, then we don’t stop the same place. Apparently Apple only measures distance in blocks/intervals to save battery. The same when Apple measures Heart rate, and the reason why everyone should wear a HRM.
Apple is definitely catching up, and I’m excited to see what the AWU4 can/will do.
No matter what watch you are using, it’s the training that makes you faster or better.