I just bought a sx4 with a 28” barrel. I have always preferred a 26” but the 28” swings and points just fine. I have a benelli m2 with a 26” and that thing is super nimble.
I agree that two inches of barrel length, more or less, makes little difference in the way my shotguns feel or swing.
Where it does make a difference is when hanging up on brush, limbs, cattails, bulrush, tules, etc. begins to be a problem. In those cases, the loss of even two inches is noticeable (to me, anyway).
Hunting out of a layout blind/boat is a prime example.