I don't have any experience with outfitters for sheep in NM, but my first question for you is are you a resident or non resident? If you're a resident, for 2022, the resident pool drawing odds were quite a bit better than than the outfitter pool drawing odds, and you should just stay in that pool.
If you're a non resident, the non resident pool draw odds were approximately 0.09% vs. 0.17% for the outfitter pool. So, a non resident would almost double their odds by signing up for the outfitter pool, but we're still talking about the difference between 1 in a 1,000 vs 1 in 600 odds of drawing the tag. So knowing those odds going in, how much effort do you want to put in researching an outfitter?
Also, all ram hunts are once-in-lifetime, and they also run pretty close to 100% success rates, so there probably is not many hunters (if any) that have hunted for rams with more than one outfitter that would be able to make a fair comparison between two different ones.
My guess is that they're all probably pretty good if you're lucky enough to draw the tag.