I'll give it a "shot. I have 2 older 12 bore 28" barreled shotguns-- (1) L.C. Smith Pigeon Grade 7lb. 4 oz. (2) Win. M21 7 lb. 6 oz.- both have almost identical stock dims, zero cast, and recoil pads and 14&1/4" LOP-- The Smith has the straight hand (English) grip and DT-- The Win. M21 has a pg, and a SST- Both are choked imp. cyl. and mod. and have 2&3/4" chambers.
Tell you what- I am far from ever owning a "Matched Pair" of Best Guns- but I have shot both guns on preserve pheasants- a "Big Day" where our club has a morning shoot, then a nice lunch, then an afternoon shoot- (all the birds and cleaned and then donated to the local VA Hospital for a feast, by the way)-- 10 guns, we usually kill and retrieve 200 birds or more-- I use the M21 for the AM shoot, and the Pigeon Grade for the PM shoot, or-vice versa, depending on my mood. Except for the trigger confirmations, I shoot either gun equally afield.
I agree with Stan on the longer barrels however- the rest of my 12 bore Smiths have either 30" or 32" barrels- I use one of those for the Tower "European" events- and they have tighter chokes. RWTF