The megahalems beats the TRUE by a couple degrees, but I wouldn't say it would be worth buying one if you already own a TRUE, I would say this is money wasted tbh..
The TRUE does an excellent job at cooling, and like entireweb said, there really isn't much difference between them really..
Having tried quite a few coolers on my previous q6600 clocked at 3.8ghz, the TRUE was way ahead at cooling that particular chip. The coolers i tried were.
All were used with the same sharkoon silent eagle 2000 rpm fan, all of them were quite a bit behind the TRUE on cooling performance.