On my car I have had a 6265, 6765,6766 and 7175. I have witnessed a 150rpm difference between a 6262 and 6265, hardly noticable, but there was also a couple of hundred revs between the 65 and 66 turbine wheels on my own car.
Yes it picked up 30hp atw but the point I was trying to make was, PTE marketed the same if not better response between the CEA wheel replacement wheels of the 65. Maybe that is the case with identical sized wheels, but from my experience not a bigger CEA vs smaller wheel. You can physically see the difference in the thickness of the older wheels.