From my experience, they breed similarly in regards to frame size. HIA must be used on a cow with guts otherwise they become quite tubular. In my experience with both bulls they will knock one down from 7 or 8 to a 6 and will take a 4 to a 5 or 5.5, but there is nothing hard and fast because there is so much variation. I you are looking to add frame, they are probably two of the best clubby bulls for that as they both have Full Flush in their pedigree.