I tried Free Aeros a few years ago, and the chamois is very low in the front with stiching there. Things were uncomfortable were they really shouldn’t be. Yikes. I returned a pair of Cuores without riding in them b/c the chamois was cut similarly. Are all Castelli like that?
I probably sound like a Le Col fan boy, and I suppose I am, but the Pro are basically nothing like the HC. Different material, different uppers, very different chamois.