What difference did the rch make? I quit using mine at the end of the season because I put a strap on the sitdrag that would not let me fall out of it.
RC harness just provides a climb rated backup for the SitDrag. I know some are comfortable without it. For me it was just a little piece of mind that I had something rated for climbing backing up something meant to be used on the ground. With my clone, I actually kind of miss the belay loop backing up my bridge connection. Probably simply because it is what I am used to.