The best of the N64 looked better than the best of the PS1 but I like them both. The best of the 3D games on both impressed me though, developers like Naughty Dog and Rareware almost seemed to exceed the capabilities of those consoles.
Yeah pretty much how I feel too.
The likes of Conker, DK64, Banjo Kazooie, and Starfox 64 were, to me, the best looking 3D games of that era.
On the other hand though, PS1 and Saturn were no slouch as stuff like the original Crash Bandicoot and Spyro trilogies and Panzer Dragoon 1 and Zwei also looked great at the time.
I have a lot of nostalgia for both looks as I owned an N64 growing up, but also spent a lot of time at my best mate's house playing on his PS1.