Pro Evo 6 for the Xbox 360 was horrible. So no wonder you didnt like it!
Pro 6 on the PS2 was loads better.
The 360 version was totally rushed, they updated the graphics obviously but left out alot of features that were in the PS2 version.
And the control and responsiveness was ALOT slower than on the PS2.
and PES2008 is going to be identical on the PS3 and Xbox 360.
There was only a difference in the 2 playable demos at Leipzig but ive read Konami are saying it will be fixed for final release.
www.winningelevenblog.com
They have some great coverage of the game.