i think "car" magazine has just compared those two cars and from what i remember reading in the shop the enzo is better. Also from what i see of the Top Gear stig the car is harder to drive fast. if the tail gets away from you going tinto a corner you cant get it back. the enzo is more forgiving! Oh if i 4got to mention the enzo won that comparison with the GT 2nd and SLR last!
p.s. on race tracks there are things called straights between corners so you cant ask which is faster round the track without taking into account the straight line speed down the straight!