I agree with those who say it's more the trigger type and platform than the caliber. I used to have a 1911 in .45 and a Kahr DAO in 9mm. I had a terrible time going back and forth between the two. They were so different that I could not shoot well with either. By illustration, I drive a stick shift and my wife's car is an automatic. I have driven both types for years, but still, when I drive her car, I have a tendency to try and push in the clutch. Muscle memory takes over unconsciously, sometimes at the worst possible moment.
So I standardized on the 1911 platform, having a full sized and a compact size, so other than size, they are identical.