Technically, PS2 was better. But PS2 was also the beginning of the end for proper single player narrative games like the Final Fantasy Series, Chrono Trigger/Cross, Colony Wars, Wing Commander, etc...

The PS2 kept those going early on, but I feel like later into it's life cycle it started to move down the "everything has to be multiplayer now" route.

Which is why, for me, my list of emulated games skews FAR heavier to old PS1 classics.

Just my opinion though. Don't shoot me, please.