What about the "magical aero qualities" of the GP4000 does it get any of this back or is the Supersonic just as good?
Below is the combined aero+Crr that shows the H3 with 3 different tires, including the 20mm Supersonic, vs. some other tire/wheel combinations.
You can see the Supersonic is the right tire among those 3 for the H3, and a good combination overall.
However not as good as the 23mm Supersonic on a Flo 90. And that's the *old* Flo 90, so the newer ones should be faster.
you raise some excellent points. one should also note that the above graphic does not take into account rotational drag. in other words, when you include 'watts to spin', one could find the the H3 combination is faster than any of the others in that chart. depending on how big you believe that value is, it would certainly outperform all others at 0-5 degrees, and maybe more.
this is notable for a rider making a selection -- particularly if they are a faster rider and/or race shorter events (higher speed).