I think of a 28 gauge as a light, Fast Pointing gun for small birds inside 30 yds, such as Quail, Woodcock & Grouse.
A 9 lb 5 oz gun I think of as a heavy gun for a smooth swing on long range pass shooting such as waterfowl.

Personally, I would find a 9 lb 5 oz 28 gauge, as we say in the south, about as useful as "Tits on a Boar Hog.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra