Didn't the magazine Shooting Sportsman compare the 2 3/4" 16 gauge against the 3" 20 gauge throwing a 1 oz. charge. Comparing these two specific shotguns the 16 gauge was throwing better patterns (more coverage less patchy spots in the 30" circle) at 40 yards then the 20 gauge was throwing at 30 yards!!! I'll take a 16 gauge anytime!!!
All the best