This is sort of a rifle vs pistol thing. If you use an optic this won't matter, but if you are just shooting off the front bead length is some small help. On targets moving through the air, barrel length does help slightly with more precise target alignment as the distances lengthen. I've said this before and gotten some comments both ways, but I still believe it. A longer barrel permits less perceived lead on a distant target.
Most shooters are a bit more comfortable when dealing with less perceived lead.
Yes, I know that barrel length doesn't matter when you are looking down the rib with the gun fully mounted. You can't judge barrel length then. Here barrel length does come into the picture. To some extent, the longer receiver gives the impression of a longer sighting plane, but it has never seemed exactly the same as the rib to me. Sort of in between.