Can't speak to TTE as we're unfamiliar with their wheels, but the difference between GC and GC+ is a few hundred RPM in spool and a little extra lag b/c of the larger compressor. For most stock motor goals, regular GC's are all the turbo you'll need. The responsiveness is fairly close to stock, these are really fun turbos to drive, no lag monsters. Remember, dynos do not show lag!
Chris
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