Seems like you would be more comfortable with the heavier gun. Weight often will mitigate recoil, muzzle flip, etc. I can understand where you're coming from - I find that I am better with the heavy gun firing a low pressure, though larger, round, as opposed to the lighter gun firing a lighter, smaller, high pressure round. I know a 44 Mag is high pressure, but the heavy gun helps tame it somewhat.
When you were shooting the 9mm, did you try different bullet weights? I was about to give up on the 9mm platform myself, and found that the slower 147's worked better for me than the 115s. And that's in a CZ P07. If you're settled on a .45 though, I'd say pick the heaviest gun, and go with standard pressure .45 ammo.
When you were shooting the 9mm, did you try different bullet weights? I was about to give up on the 9mm platform myself, and found that the slower 147's worked better for me than the 115s. And that's in a CZ P07. If you're settled on a .45 though, I'd say pick the heaviest gun, and go with standard pressure .45 ammo.