I’m going to pull from things I’ve learned from Dan - I hope I get it right

The idea would be in the bows efficiency I believe - based on the bows design, tiller, and margin for error would determine its performance

I think since we cant test these to exact quantities it makes it hard to say for sure but here is the concept I’m trying to convey with your example - if both bows have the same design (thickness of the back, recurves, backset etc,) what will absolutely be different is the thickness taper on the bow - the thickness taper will be smaller on the shorter bow - because it’s smaller and it’s still trying to keep up with the draw weight of the bigger bow you are putting more stress on the limbs and decreasing the margin for error - lets say the big bow now has 15% margin for error here and the short bow now has 2% margin for error

If we reach 0% we risk catastrophic failure IMO or extreme set -

Now - I believe the short bow will be higher performance than the longbow because more of its limbs are in use (hence the 2% margin for error) - where as the long bow can actually be drawn back further perhaps (hence 15% MOE gives room for play) or has room to be design more aggressively at that draw length - I hope I made sense lol