Trek uses more than the H1, H2 and H3.
They have Domane classic which is both longer and lower than H1. Than they also have the Koppenberg which is a the third size for Domane. The classic model geo is a bit weird IMO. So Domane H3 is a radical change in geo compared to the other two versions.
Emonda looks great, but i would not cry if it had longer front to center.