blackbear-h
I shoot a Ruger Red Label 20g O/U and it is a nice handling gun.
The Red Label has a very low action frame profile and the feel and ballance is very good.
They have a couple of other good things including hammer interrupters, rebounding hammers, mechanical single selective trigger, and ejectors.
They also have a system to help prevent doubling from involuntary second pull.

Haven't handled either of the others so cannot compare them.