Pardon the drift, but most, I think would classify a 6.5-20 as something other than a small-game scope, EFR or not. Maybe it's a terminology difference. Small game to me generally means small edible mammals or even some birds, as opposed to varmints, often shot at long range.
Don't know about the brands you mention because they're out of my "range". Try the airgun sites for ideas. Those guys use a lot of PA scopes, using the focus for guessing range IIRC in Field Target.
