Can’t answer - probably depends on the overall experience - you want to be where you want to be, etc.
But on this feeder list, UCLA is #10 but I don’t see them when you adjust for enrollment. Don’t see USC at all.
I’d be less concerned with grade inflation - I’m sure schools know who and who isn’t, etc. and more concerned with their in the environment where they can excel (and the one that you can afford since med school will be a boat load if they ultimately, pursue).
Best of luck to him - are these acceptances in or hypothetical? I assume the latter.
Top Feeders to Medical School (■■■■■■■■■■■■■■■■■■■■■■)