Having tried them both, I prefer the SLR. The Aspide is very firm, and my parts protest after about 40 miles. The SLR is a little more padded, but with a good firm base underneath the padding.

I don't normally need a cut-out, but had some issues with numbness with the Aspide Glamour. I never did figure out exactly why, but it was after ~40 miles, just like the sitbone pain that I was experiencing. The combination of discomforts led me to give up on the Aspide for the SLR.

YMMV, IMHO, and all that stuff, of course.