I believe the BIQU plates are sprayed resulting in the textured feeling, whereas the BBL plates are dipped resulting in a rubbery glove-like finish. They do feel different to the touch, but I believe that’s mostly due to how the coating was applied.
The BBL plates are actually not thicker, but thinner. Almost by 1mm. There’s a YouTube channel (Need it make it) that reviews them detailedly (is that a word?) https://youtu.be/gl8ABgIuQhs?si=z4WnUnYsS4cUgNd2
I got my second SuperTack in the mail today. I will test ASA on it today, for science! 