This is the way I see it.
RC - Large member base to either buy or sell corals/equipment to/from. But the mods have chased away almost all the og members and it just isn't what it was say 10 years ago.
R2R - Only good for seeing some amazing corals as it's mostly a market place for high end signature pieces. Even if you are part of the "click" over there, it would never be the comradery that peeps on SCR have because here we actually do hang out and build on the friendships created online. Where as on R2R, it's more like
"Hey Jim, when are we hanging out?"
"Oh Bob, it would be nice but you're in Florida and I'm in Idaho"
and all the other ones such as Worldwidereefers, 1Reef, The Saltwater reef and Gumbilicious reef never really got off the ground IMO.
Now SCR is the perfect balance of highly intelligent yet modest reefers willing to help at the drop of a dime combined with a good number of smart a$$es that can bring the brigher side to almost any situation just to keep the forum light and airy. That along with Mikee opening the forum to members in far away lands is a genius move not only to increase revenue but also to bring more notoriety to us as the great bonded community that we are : )
"We may fight amongst each other and call each other names, even talk about each others' mommas, but if an outsider comes in and attacks one of us, we will band together, pitch forks in hands and make sure that threat is rendered futile"