The N64 is responsible for blur induced headaches, but you don't have time to complain because the game levels load nearly instantly.
Weirdly, I think sharpness is exactly where PS1 games don't hold up. Metal Gear Solid is less off-putting to go back to than Metal Gear Solid 2. The pixely textures and dim lighting give it some atmosphere, where the extra detail in MGS2 just comes off as very plastic now.
The N64 has it’s own set of graphical limitations, but hold up a bit better to the test of time, IMO. At the time I know it was the school yard debate of which looked better and many felt the sharpness of the PS1 was preferred over the softer N64 image.