Having tangled with all of these aliases at some point or another, I'm definitely left with the impression that dinofelis was the more capable debater compared to Anti-Cen/RNC. 

While dinofelis' arguments weren't entirely without fault, there was at least coherent reasoning demonstrated and it felt like I had a challenging opponent when seemingly valid counterpoints were raised to my arguments.  I feel like I can actually respect the stance of dinofelis, even when I disagree with it. 

Whereas Anti-Cen/RNC, on the other hand, generally just comes across as having a genuine cognitive dysfunction.  It was like shooting fish in a barrel because they seemed so utterly dense.  The experience just wasn't the same.  Personally, I find it unlikely they're the same person. 

It also looks like they've conversed with each other in the past.