In my post I'm not taking the amount of lead itself in consideration as that is taken care of by a lead adjuster. When I post a 49 thousands of an inch advantage with the 45 over the 9 that is if both shots hit the same place the outside of the 45 bullet would be 49 thousands of an inch closer to the center, maybe that's enough to touch the next scoring line. But bullet flight time does seem to make a difference on the mover both guns with mover adjustment, every thing else equal at least for me when back when I was shooting good, I was more consistent with higher velocity and often shots I called marginal were still good. Think of recoil this way, every bit of extra recoil gives you less time to aim, it may seem insignificant but it really adds up on the barricade. Also when you go to a larger bore at the same power factor the larger bore has more torque in your hand. We are splitting hairs and I'm assuming you are looking for any small gain to make the difference between a winning score or not, at that level small differences add up.
In the end it's which pistol and load you shoot best and have confidence in.