Re: R.E. or O.M.E.
Sorry I can't answer all of your questions. All I can say is that I have OME springs & shocks on my YJ, and I am able to keep up with the 4" guys just fine. On every trip, I always receive compliments for their articulation. I spent the extra money, and I'm glad that I did.
They ride great on- and offroad, too.