Not doubting the PS1's success, that seems to be an issue with many on here. The view is the N64 was still very successful for Nintendo.
As for the software, N64 was clearly quality over quantity here. I cant think of any PS1 game scoring over a 97 meta yet I can think of a couple N64 titles doing so off the top of my head. If you know any PS1 title achieving a 97 and up happy for you to tell me.
Tony Hawks Pro Skater 2 got 98 on PS1.
Regardless "Quality over Quantity" is only the case if the score is arbitrarily set at one of the few specific points where N64 comes out ontop.
If you decide that 99,97,96 or 95 should be the metric used then N64 wins, if you use 98 or 100 it's a draw, if you choose any of the other 95 values PS1 wins.