At static, I was careful to not change the power load and rpm of the prop. That is the only way to be able to compare results.
As soon as the plane speeds enters the picture, results get interesting though. My calculator cannot handle that at the moment, so new rpm and prop load have to be calculated manually using i.e. Clark-Y lift-drag curve data.
The graphs show however clearly, that the higher pitched prop will ask more engine power at higher speeds, even though the heavily graded prop diameter is less.