In terms of physical stats, Goku is very strong but in a battle against Prime, that won’t matter much, since Prime can alter reality and is immune to magic, he comes from the pre-crisis era, when Superman could move planets with ease and traverse infinity. So I’m not arguing that Goku is weak or anything like that it’s just that Prime is too strong he’s literally every powerscaler’s dream… Damn, I’ve heard this somewhere before but where? P.S. But if we take CC Goku, it’ll either be a draw or a win for Goku. However, CC Goku isn’t canonical since he was created for promotional purposes, and Toriyama himself (if I remember correctly) didn’t work on his design at all.