I know plenty of people with HMRs and they do what they say on the tin. They're a hunting match rifle. Not sure about the carbon but the Steel barrel version handles 16x 8-12 shot PRS Stages one weekend and goes out on a stalk the next no problem.
Almost got one myself But ended up with a Tikka T3x Tac A1 and very quickly after chopped that in for an AI.
Just make sure you get hands on with one and like the stock. Worse case scenario if you don't like it it's at least a Rem700 action with plenty of available aftermarket stocks and chassis.
I've no experience with the Gen 2 Ruger but they appear to be liked online. I considered one not long ago but went with the Bergara Stoke .223 and put it straight into a chassis. Not to say the Ruger wouldn't have been a good choice, I just wanted something that I could put in a chassis and that had more aftermarket support.
Have you picked a scope out for them both yet?