So I went to the range at lunch and put about 50 rounds through my 1911 and 50 through my M&P Shield 45 and about 31 through my M&P Shield 9 (I only had what was in my full mags). The Shield 45 did not have as sharp a recoil as the Shield 9, but it was not as deep (for lack of a better word) a recoil as the 1911. I need to shoot both Shields side by side more to get a better opinion, but I already think I like the 45 more than the 9.
I still like my 1911 the best. I can keep a decent grouping in the center and further out with it. I still pull down and left with both Shields (not as bad with the 45). That is a different topic, but I wonder what I am doing different. The trigger is definitely different between a 1911 and a striker fired pistol. That and the weight. It makes me wonder if that is the cause.
Sometimes I just aim high and right.