I think that the problem with the pace kit is that the inlet and outlet to it are on both on the same side and very close to each other, therefore the quickest route for the air is more or less straight out, meaning it doesnt get any cooler and has no benefit.
Whereas the EVO intercooler has inlet and outlet at opposite sides meaning the air has to go right through the intercooler, therefore cooling down and giving the benefits.
However, this could be a load of rubbish, im sure someone will confirm soon