Are you talking about the 6-core maps which briefly turned up for some people but were greyed out? Those were never meant to be released, well, certainly not yet at any rate, so they went and are not available to anyone.
The benchmark is kind of simple compared to a vast map with loads of AI, I expect it benefits more from the 6700k's higher frequency over the 6900k's extra cores. I think in a big game the 6900k will do better, though to be honest I think you'd be fairly hard pressed to put the game into a position that the 6700k couldn't handle. If you run the game's CPU focused benchmark the results might be more interesting and should favour the 6900k by a fair margin.
You could overclock the 6900k for a bit more single core goodness. I think the 6800k overclocks to 4.0Ghz fine so makes for a good gaming and production system. For peak gaming performance the 6900k's single core frequencies are a bit too slow. Off the top of my head I don't know how much it comfortably clocks to though.
Quick graph on Ashes you might find interesting for comparison:
(If you only have 2 sticks of RAM make sure your RAM sticks are in the right slots, otherwise the dual channel bandwidth loss can hurt performance a lot(If you have 4 sticks I guess it will use quad channel automatically))