The second card has VIVO (video in video out) and is cheaper. There is no difference between the cards apart from the cheaper one has more features. Maybe the champion edition comes with a big software bundle?
Folding for Beyond3D
"A lie gets halfway around the world before the truth has a chance to get its pants on."
Sir Winston Churchill
"Halflife2 got halfway around the world before Gabe had a chance to get his pants on."