They both have pro:cons.
Having run both here are my 2 cents based on using them with OME 885 & 895 springs.
Front 5100 vs OME w/885. Around town both felt good, on the trail the OME felt more controlled.
Rear 5100 vs OME w/895. Around town: the 5100 was more comfortable, the OME was over damped. Loaded with gear: OME was more controlled, once the truck was loaded with gear for trip the OME controlled body movement better and rode better on the street. The 5100 felt too soft, ie under damped. On the trail: OME felt more planted once the suspension was flexed. 5100 felt less controlled.
My opinion: OME rear shocks are better for trucks carrying more gear (consistently) with stiffer springs like the 895's. I feel the 895 springs are too much for the 5100. Unless you are carrying gear all the time something like the the superflex's are better all around rear springs. These match well with 5100's.
These are my observations while running them. Needless to say I wasn't satisfied with either so I am running custom valved Fox's now.