hello mate i work for one of the companys in question,and i will say that they are all within a snif of each other,as provern in performance ford mag a month or two ago.the pace one cooled the air the most as it had the same sort of outlet temps as the others considering the inlet temps were more than the rest which was caused by the turbulater foil which i no has been modded since to be better than before and the new pace 500 cooler has revised end tanks and a bigger volume core .but they are all close so u wouldnt notice a performance differance from one to another on your motor. the one thing that the pace cooler does have over the rest hands down is it is so much lighter than the rest and they do allways look good.they can also make one offs in the case of wanting something abit different