AMD vs. Intel? Feh. For power users, it’s all about quad-core Sandy Bridge vs. hexa-core Gulftown (or if you’re not up with the brevity thing Core i7-2600K versus Core i7-980X). Maximum PC’s Gordon Mah Ung highlights the kinds of sacrifices you might have to make if you decide to go with the hexa-core when configuring your next machine. And, surprisingly, a high-clocked Sandy Bridge system will give its older sibling a shockingly good competition.
You can find Gordon’s official reviews of both machines here and here.