Hey, good call! That's an astute observation, they may be the same.
I tried the Galbani last night - 1/2 the pizza was pure Galbani and the other half was 3/4 Galbani, 1/4 Jack with some fresh Parmesan grated in. The pure Galbani side was nice (better than skim Mozzarella) but the side with Jack was better.
Thanks again Perry, I think I'll do some searching on this site for people's various ideas on favorite cheese combinations.