i cant say i have seen any difference at all.
but i dont understand what Usage means (it cannot be only screentime):
6s+
- usage 10hours
- standby 40hours
(battery was left below 10%)
safari was using 83% (screentime only 3,6h)
when i sum apps together, i get around 4hours (screentime).
so what is the rest of the 10hours of the usage? 6hours is missing... does it mean that "the 6hours" is the sum of the other usage like wifi etc on the background? abit missleading info and seems to be also the reason why i have found alot comments that Usage in ios means screentime which it clearly cannot be. it must be screentime + background processes (like wifi/data).