IglooEater said:
By that logic the 1DX had nothing over the 6D. I don't think you mean that. More AF points do make certain tasks much easier, especially sports and wildlife, where keeping an AF point on target while tracking is paramount.
Cameras are all about actually creating the image you want. IQ is only a part of that.
Of course, the 19 point 70D is not rubbish, but there's no question the 7D II's AF system will have the clear edge in certain applications. I think folks are hoping for more than 19 to make the new 6D an more versatile all-rounder.
I get that, but I doubt that a 6D mk II which might be less expensive than a 5D mk III will sell less against a 5D mk III just because of the AF... The 5D mk III focus system is quite capable, but I can think of only very rare occasions where this might give you an image that you can't get with a 6D mk II, probably. We are not talking about fps here, just about AF capabilities. And if you take the rest in, the 6D would just be an overall better performer with a much more advanced processor making that AF to be on a same level, except coverage probably.
Take in other factors like lenses, they are much more prone to give you bad results than a body with a modern AF system where there are "just" 50% of the cross-type points available.
If you are dependant on getting that image, you will take the 5D mk IV or 1DX mk II anyway, and not an aged 5D mk III (except you might shoot one for a bargin).