The best of the semi-autos for repeat shooting are the Benneli M4's, seems to me. They hold on target a lot better with very little if any rise of the barrels. That seemed to be the selling point of them. Might be the reason the Fed. Gvt. here tried to ban them.
All I have is SxS for black powder and a couple pump-guns currently. They are plenty fast shooting, just as fast as a semi-auto or faster, if one practices a bit.
Slamming the slide forward brings the gun back to where you are looking on-target, whereas with a SA, you have to physically pull it down out of recoil. With the pump gun, that happens automatically.