I don't own the RC, but I do own the 7.62 Mini and the Socom 300.
The Socom is fantastic. I've used it on my Remington 700, and it makes it sound and recoil like a .22 LR. There's almost no kick, and it's very quiet.
The Mini isn't really built for full 7.62x51mm - it does what it can, but at only 6 inche long and 4 useable inches of expansion volume, it's not going to sound like a full size 30 cal can with that's 8 inches long and with 6 inches of useable expansion volume (so 50% more than the mini).
Where it does shine is on my .300 BO. I've heard others say they're disapointed with the sound - but I find it excellent. With subs, it's action noise and bullet impact on the backstop only. Sounds good with supers too.
So, you're probably thinking, OK, he's talked about two cans, neither of which is a RC. My point is that I don't see much purpose in the RC. It's as long as the .300 BO, but not nearly as quiet, and from Silerncer Shop's web site, over 400 bucks more expensive.
The RC's are supposed to be mule tough, and built super, super rugged, while the Socom 300 was built more for sound and for a lower cost. It's not really like you're going to wear the thing out or damage it short of full auto blasts from a SBR, and if it does, just sent it back and they'll repair it.
At 1400 bucks, for a 8 inch can that's not particulary quiet from the reviews, I'd look at something else from SF.
What are you planning on using this on? If it's a .308, I'd go with a Socom 300. If it's a .300 BO with the optionality of a 6.8 or 5.56mm, I'd go with the 7.62 mini, to keep your AR package at a decent length, compared to one that's 24 inches long (16 inch barrel plus an 8 inch can).