Now that the new 7D II specs have been released...
Should I go with the 6D or the 7DII, I know the one difference is the 6D is full frame. How will the new 7D II do with taking portraits and everyday shooting? Lighting ? I hear the 6D is great with low lighting.
And is there really a HUGE difference from full frame to crop?
As someone who shoots almost every day with a FF 5D3 and an APS-H x1.3 crop 1D MkIV, (in some ways a similar pair to a 6D and a 7DII) I understand your dilemma. For sheer image/file quality it's no surprise to anyone that the 5D3 delivers more whether shooting in the optimum 100-800 iso range and even more so above 1600-3200 iso.
If you value getting the magic moment in a dynamic flow of action whether that be sports, fast moving kids or pets or wildlife, the 7DII will give you more keepers. For premium landscape, nicely lit static shots and so on the 6D will pull comfortably ahead. Like someone else said, they're very
If your outdoor, landscape, static shots are going to be printed 20 or 30 inches, then the 7D2 will show it's APS-C limitations. But if you print small, or mainly view them on a screen you could be better off with the 7DII.
So consider what your intended output is going to be. If it's unlikely to be in the exhibition print category, between the 7DII and the 6D I'd recommend the latest...the 7DII. But will the budget stretch to a 5DIII? It has the FF advantage plus more sophisticated AF abilities than the 6D.