I noticed that a similar question was posted a few months ago so sorry for the redundancy but I'd like to get a few more opinions.
I currently have a 7D but want a FF. I mostly shoot landscapes, street, wildlife, some concert and other "miscellaneous stuff" currently but I'm also getting into portraits and outdoor family sessions. I don't really do sports but that's also not off the table either (I'm just all over the map really). And that I think is my dilemma between the two...I don't want to limit myself camera-wise because I want to be able to shoot practically everything if needed. Skill-wise I may be limited in some aspects but that's on me
I like idea of the better higher ISO and lower light focusing of the 6D but I'm wondering if I'll be regretting the more expansive AF of the 5D. One instance I'm thinking of is say I get an 85 f/1.2 or something of the like. I usually just use the center point, focus and recompose but I'm wondering if that's always doable with such a shallow DOF. In which case the better outer focusing of the 5D would be much better. How many times would I be in that situation? I don't know but I'd like ability for the camera to handle it if it arises. Another would be if I did decide to do some sports...Could the 6D handle that for the most part? And this is all assuming the IQ of both cameras is very similar. From what I've read and seen that seems to be the case but can anyone attest to that also?
I've been doing a lot of research and, although I'm not opposed to spending the money, I just want to make sure it's worth it. I'd also hate to NOT spend the money and regret that as well. I know it's all about the glass and I'm slowly working on building that up as well. However I'd like to make the right decision from the get go on the camera. So I guess, put another way...if someone were to offer you either camera, which would you take and why? And no, you couldn't turn around and sell it 
Thanks. Kevin
Decisions, decisions.
