Perhaps in the paper the different RCs are named, but on his blog they are called RC1...
When I A/B tested the 4311 to Pioneer, the sound was not really different between then two RCs for my setup. Overall, I found my sub to handle the low frequency RC better than the 4311. Others might find the need for the 4311 to tame their subs and find more benefit due to their room setup. I generally prefer the RC for movies, but I should try a newer release without so I can compare.