I'm considering picking up either the 6D or 5D Mk II, which camera would you expect to be better?
You cannot pick up the 6d, it doesn't exist yet. And just that Canon states "December" doesn't mean anything knowing their release schedule problems, the "newly developed sensor" might very well produce a delay.
I'd wait for real life ISO performance and comparison of the AF systems, otherwise the two cameras appear quite comparable. No mention of AFMA on 6D, which may be an issue on FF sensors
6d has afma (and silent shutter, gps, wifi over the 5d2).
Well it is now confirmed that the 6D has 11 point AF with only one cross type point.
Actually Canon specs implies that the 6d has *no* cross sensor at all if you're using a f2.8 lens - if this is correct it would be arrogant beyond belief and a measure to protect the "pro" 5d3 at all costs.