I'm participating in both 9 UI on my Watch 6 and Galaxy S23 Ultra. I weigh myself on both a Withings scale and in the Body Composition on my Watch 6. Weight, fat mass, water is all the same but muscle on the Watch says it's half of what it really is. Just reporting that's a problem.
Smart scales aren't necessarily reliable either. That being said, smart scales without handles only measure the lower half of your body. Galaxy watches (and any other wearable) only measure the upper half of your body. They both then make calculations estimating your total muscle mass and body water. Neither will ever match. And neither are close to a dexa scan
It has always been exactly the same until the Beta App. I went from 122 lbs muscle to 60 lbs on the watch. It is usually withing 10ths difference. There's something wrong.
