I would say go the extra distance with the 3" ,it is worth the eatrx $20.00.
the 2 3/4 will take a bird just as dead,if you get him close,(that is the name of the game;getting them close).but some want get that extra 10 yards.thats when the 3" comes in handy.
I shoot a BPS 3" 12 ga. would not trade it for anything.love it.
had a 3 1/2" and sold it,and went back to the BPS 3" .

just my 2 cents,there are 98 more!!