According to the Dolomite website, they only make the Z Pro 130 and Race 150. Not sure about the 110.
The 130 has a 98mm last (i do not know exactly in which size). The 150 has a 95 mm last (again, same sizing issue). I was told that they run small. I think Jeff Bergeron said the same thing.
IMO the XT is closer to the Z Race than the Z Pro. I believe Jeff said that the XT has a 96mm last (again, i do not know in which size).
there are other things to consider such as the liner. The Z130's liner is thicker than the XT. I do not know how thin the 150's liner is.
I have the XT-17 and i use the Race R lace-up flow liner. It is a copy of the Dobie's lace-up flow liner. Only the materials are different. The Dobie liner is the best money can buy. If you can, get a pair and forget about the stock liner (even with the Z Race).