Just threw together an overlay dyno chart:
 There is a pretty decent difference between the two, although the significantly higher peak of the Sport600's make the lag worth the wait. These are two of some of the highest performing TT's per their given modifications. There is almost a 200ft/lbs difference between them at 4000RPM, but by 4500RPM, the Sport600's are tied up and then quickly overcome the stockers by about 150ft/lbs at 5200RPM or so. Not to mention, there is a 200RWHP difference between the different turbos at their peak. Dee Ridgeway's Sport600 Powered TT (with SpecialtyZ inconel manifolds)

Stock turbos - stock manifolds, dp, tp, cat-back, dual intake


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