brakes, tires, wheels, interior cloth, steering wheel, badging, oil cooler, different size radiator to make room for intercooler, air intake for turbo, all of the exhaust, ECU....
Well, from what I've heard, ours is stainless all the way back from the downpipe, as oppsed to aluminized. And there is no "downpipe" on the protege...and the muffler and tip are obviously different. I suppose the cats and resonator could be the same, now that I think about it.