Hard to say for sure, no one is better than anyone else until they prove it.
These past fights should really show that the UFC is different from Pride. Fighting in a cage under U.S. rules is not the same game as fighting in Pride with japanese rules. The UFC is a much more strategic sport, where Pride is about aggression and decimation. In the UFC often your best bet is the lie on the ground and/or run away as we saw by Eddie Sanchez. And NO DISRESPECT to Eddie Sanchez whatsoever, he actually impressed me. He was smart about running away from CroCop and he landed a couple of clean blows to. On top of that, he took several kicks and never collapsed outright even though others woulda been KOed.
I don't think Pride fighters are better than UFC fighters thgouh, just check out GSP. Mikro Cro Cop is better than almost any heavyweight in the world though, so when he gets moved over to the UFC and rises to the top, that's more of an obvious statement about him and less about Pride itself.
My Top 5
1. Cro Cop
3. Mauricio RuA
4. Quinton Jackson
5. BJ Penn