· I prefer the 6D’s more simplified menu layout to the A99’s however both cameras have intuitive menus and it shouldn’t be an issue coming up to speed on either. The A99 has substantially many more customizable buttons; in fact almost all the buttons are customizable. Unlike the 6D, the A99 doesn’t have the ability to save your most used menu items to a favorites section
· I really like that I can shoot in 16:9 aspect ratio on the A99 and I can see it in real time through the EVF while I’m composing my shot; this is great for street photography and cinematic shots. The 6D can shoot in 4 different aspect ratios but seeing the view of the aspect ratio real time while composing requires using the rear LCD screen. I personally detest composing using the LCD screen; so this isn’t a feature I take advantage of on the 6D. Both 6D and A99 both have native 3:2 aspect ratios; when you are shooting in other ratios, the images are still shot in 3:2 but automatically cropped by the camera to your desired ratio; the cropped out areas are simply not shown but they are still saved by the camera and can be accessed by expanding the crop area when viewed on a computer.