I just bought this years Pearl Izumi Pro Bib Short and can only compare them to Pearl Izumi Micro Sensor Bib Short fro a year ago.( I pretty much think they are the same bib short but only a newer model) I like both very much but this years chamois is better, imo, and the shoulder straps are a bit wider so a little more comfortable.
They fit very well and give good compression. Leg grippers keep everything where they need to be. I have ridden in high 90° weather and have not over heated at all.
I plan to buy the Thermal version for the fall and early winter.