I have a pair of PI shorts - can't remember the model but the chamois has no grooves or anything, just a uniform pad - and some Shebeest SSS. Between the two the Shebeest chamois is not as firm. If you measured them uncompressed, they're probably a similar thickness, but the Shebeest compresses quite a bit more when you sit on them. Really they're both too thick for my taste.

I much prefer tights with no chamois that I can either run in, or wear over cycling shorts.