I have tried both the regular and the HERS Chamois Butt'r but NOT the Eurostyle Butt'r.

I personally like the HERS Chamois Butt'r better because it seems a tiny bit thicker which seems to make it last longer on my body/chamois pad.

No difference in my groin region regarding the pH balance of the HERS Butt'r vs the regular one from what I can tell.