I've done both, both great schools, with slightly different focusses.
Rifles only PR1&2 was the first precision rifle course I've ever taken. Big time focus on fundamentals, they absolutely drill it into you. You will learn to shoot prone, barricades, kneeling, standing, movers, etc all while having the fundamentals heavily enforced. Steel out to 1,100 yards I believe. They have a drill called moving chaos, which takes place on the platform which involves targets at multiple distances and a mover. It's awesome. The mousetrap is a unique contraption which will absolutely test your positional skills, in various regards.
K&M has a top notch facility, they've pumped a good amount of money into it and it shows. Lots of different barricades and contraptions to shoot from, movers as well. Probably the marquee location for PRS events, and the main focus for their PR 1&2 equivalent is how to tackle typical PRS stages. I think they have steel out to 1,400+ yards now, from what I remember when I was there years ago the farthest target was 1,200 yards. Their big connex shoot house is pretty cool, and they have a variety of different ranges.
Both are top notch in their own ways, and you will come out of either a much better shooter, equipped with the knowledge to continue advancing as a shooter in precision riflery. My personal recommendation is if it's your first professional training, go to RO and get the fundamentals absolutely hammered into you. From there, if you want more of a PRS centric training, go to K&M.
There really isn't a bad choice between the two. No matter which one you go to, go with an open mind, ask lots of questions and enjoy yourself! Professional training is IMO the best money you can spend on this sport as a shooter if you want to progress to the next level.