Actually you'll have exactly the CL version
The only internal difference is the timing of the exhaust port. The CL version opens at 70 degrees BBDC while I believe the RC opens at 74 degrees. You might want to try the RC liner first because a couple of guys on SSW have said it runs quite well, maybe not as good as the CL version though.

I must admit I'm majorly impressed with my G51, it's got virtually identical power to my Stalker 61 and pulls a large model around with ease while 4 stroking. Ditch the muffler though.