Why would anyone have the same choke in an O/U or SxS for turkey hunting? None of my business of course, but it just seems that is the only real advantage of a two barrel. I shoot O/U exclusively for duck, goose, dove and quail, so I love the action of an O/U. But may as well have 3 shots if all the same choke.
I put an Imp Mod in one barrel and a 555 in the other- less than 20 yds in one and 21-40 yds in the other.