Trez is more consistent IMO, and he's better at shooting on the turn.
Speed: Both not that fast (I think?)
Dribbling: Kluivert
Headers: Kluivert
Finishing: Trezeguet
Passing: Both don't really pass
Crossing: As above
Strength: Kluivert
Consistency: Trezeguet
Selfishness: Trez is...