unless they have your arse with them, such a question / answer will tell you nothing.
My OH ended up with the 165mm version and she finds the most comfortable of various alternatives tried. Equally useless info for you.
It has a limited amount of squish to it, i.e. it isn't rock hard, if that's what you mean.
Sigma sports were happy with me ordering and sending back (in unmarked condition) various different saddle that were tested on the turbo bike.