Thanks for putting that together. What may seem a minimal difference to you because of your superior fitness/ability, is a more noticeable difference to me. I found the Specialized tires to be an upgrade over Kenda's and WTB's, but not as good on grip as a DHR2 and Assegai. Even though they are better priced, I would rather pay the extra $15-20 and get better performance. I typically run a set of tires/year.
My ideal tire combo would be like the Assegai/DHR2 EXO+ combo with a touch better weight, better rolling resistance, and just a bit more grip out back. I would also like to be a fitter, better technical climber, haha. . .