I don't think anyone can answer that with absolute certainty. I have heard so many different things about both. I am considering adding CB to my regimen, and I am already using RU. Why not? If I am going down, might as well go down swinging.
All right thank you guys that's great. Not sure about that ru58841.info site tho, it looks somehow biased. Anyway as far as i'm concerned CB is out of my budget atm.