Do you have the same length risers on each rig? For example having 26inch risers compared to 20 is going to increase the recovery arc.
Also yes different DOM can mean a different version without necessary being aware of the changes. I had a 93 and 94 jvx. The 93 had stabilizers the 94 didnt. Fir some reason the 94 had a completely different feel to it and felt SO much bigger to fly then my 93. I could not work out why, the harness that the 94 was in was also a little small and uncomfortable for me maybe that also had a role to play.. there is so many factors and it is hard to pin point exactly but definitely gets ya thinking!