I have two pairs of the Tioga Comp Pool tyres waiting for my R20 project. One pair has a 90psi max on the sidewall, and the other a 60psi max.
So it doesn't seem valid to compare different tyres under conditions that they cannot run at.
BTW, since I have these four tyres (bought the 60psi ones first, then found the 90's), should I:
1) run a 60 on the front and a 90 on the back, and have a spare pair.
2) run a 90 on the front and a 60 on the back, and have a spare pair.
3) run the 60's both ends for general use, save the 90's for "special" outings.
4) say "what the h*ll" and just run the 90's.
BTW I'm a Clydesdale, and my R20 will have front suspension.