Originally Posted by danniexi
I seem to be in the same situation as OP.
I am by no means a professional. This is only a hobby. I was looking into getting the 5DMKIII until Canon announced the 6D. But what was disappointing about the 6D was the 11-point AF system, whereas the new 5D has 64. Huge difference, no? Or does that have to do with the AI Servo? I am looking to upgrade to a full frame and these two are the only ones within my budget.
A lot of my shooting consist of action shots, portraits, and indoor/low light photography. The newer 6D should be fast enough, correct?
For your uses, the 6D will serve you very well. There are some other small reasons for some to go to the 5D MkIII, but IMO it's if you really need the AI Servo mode and/or the 61-point system. Now that I've lived with the MkIII's AF system for a few months, I couldn't live without it for birds in flight and other fast moving subjects. I'd be useful for any sports photography, but not essential unless that is a large portion of your shooting.
"Action shots" of childrens' sports doesn't really require the MkIII's AF system. It could be helpful, but you could get by with a much less sophisticated AF system.