Originally Posted by neuroanatomist
Seems like it to me, too. (But then, I'm not a 1D IV owner. Personally, I'd take the FF any day.)
We still don't know what the low light performance will be like, nor how much improvement (if any) we'll see in the new AF. If both are leaps ahead of existing state of the art, this will be an exciting camera. If neither is, then the 1DX seems to me like a merged 1Ds/1D that does not much improve on the strengths of either.