I have a Note 8 phone and running the most up to date Samsung Health App. My partner uses a S7 Edge and also an up to date App yet they appear different and can log and show different details. One thing I don't have on mine but want, is to show my weekly total steps on the insight report, not just the daily or weekly average.
I also have issues with the sleep log being innacurate. I leave watch and phone on charge overnight yet my sleep log seems to think I sleep for about 1-2 hours and get up at 1am. The phone and watch are no where near bed to be knocked and it used to show I woke up when I picked up phone or watch in the morning.