No question that I shoot better with a dot than with pistol irons too, especially those very small guns with their short sight radius.
I tried dot sights (Holosun & Romeo) on my P365x and found them to be more precise but not as fast for me. For that reason, I have a dot on my suppressed MK IV pistol for small game and plinking, but use irons on my carry guns. At defensive distances, I'll take speed over precision.