Ok thanks. I had heard the whole "progressive rate" line and thought it meant better offroad capability over stock. Then someone told me that both the stock prerunner and TRD (complete with +15hp stickers on the side) were the same exact setup. Thanks for answering the question, I think I kinda confused everyone else with it.
BTW, the 4-banger "TRD" is, from what I know, just stickers people buy to look cool.
One more question: What does "progressive rate" suspension actually mean in terms of noticeable performance? I've never really heard the term used except when referring to TRD suspension.