Actualy, I'm developing a card in my basement and rumor has it that it will be the true king
Seriously, given architectural differences, driver issues, production quality, and memory optimization, it will be hard to tell who will have "THE" card to have till the they can be tested side by side. Untill then, you can talk rumored specs and performance all you want and you won't be any closer to knowing the truth.
"Search your feelings you know it to be true, I am your... twin sister" - Darth Vader