In my experiences Carminas are definitely great shoes but I can tell a reasonable difference between them and Gaziano and Girlings. I have 3 or 4 pairs of Carminas so I can compare them. I'd have to say currently they are the best value in higher end mens shoes. Definitely not a $600 difference but I'll still be ordering predominately G&G and EGs.
I'd consider a leather U-Cap boot for sure from Carmina as well as a few other models. Just waiting for the GMTOs or pre-orders to be announced.