I would agree with other posters that .40 tends to be a little more difficult to control than .45. The smoothest shooting .40 I ever shot was a PX4 Storm.
Of course, conventional wisdom doesn't always apply when it comes to perceived muzzle flip. I can track the sights better with my M&P9c than I can with my full size and all steel CZ85 (also a 9). I think a lot of it comes down to ergonomics and how you grip the gun.
Of course, conventional wisdom doesn't always apply when it comes to perceived muzzle flip. I can track the sights better with my M&P9c than I can with my full size and all steel CZ85 (also a 9). I think a lot of it comes down to ergonomics and how you grip the gun.