Yes the funny thing about that is that, while GRAW is a poster child for PhysX, Havoc was the underlying engine for the game physics (not the visual physics) and for UT3 it's Epic own physics engine.
Both Havoc and PhysX are good, just nothing from either has really been too exciting really. It's like arguing who has the bigger pile of dung, sure one may have better numbers, but it's still Cr@p !