I haven't looked it up recently, but I believe the CheyTac is a little bit flatter shooting than the Barrett and the .408 bullet has a very low coefficient, making it the better rifle, but only marginally so. Either on is a top-notch long range game taker.
“Malo periculosam, libertatem quam quietam servitutem." (I prefer the tumult of liberty to the quiet of servitude.). Thomas Jefferson
"All that is necessary for the triumph of evil is that good men do nothing."
-Edmund Burke, Loosely translated from Thoughts on the Cause of Present Discontents. (1770)