Take a look at the comparison between recently announce Sony A7 II Mirrorless camera and waiting to be updated Canon 5D Mark III DSLR.
The recently announced Sony uses a Hybrid AF CMOS sensor that fabricated with 117 Phase AF points inside it, the camera also features additional 25 contrast based AF points, on the other hand the Canon 5D Mark II uses a additional AF sensor with 61-point autofocus points and 41 cross-type AF points (with f/4 lens support) and 5 dual diagonal AF points (with f/2.8 sensitivity).
The 5D Mark III phase AF system is active only when you are using viewfinder, when you are recording videos or using live view display unit the contrast AF system gets activated and phase AF system gets deactivated.
Sony A7 II HYBRID AF system is always active weather you are using a viewfinder, display unit for shooting your fav composition or when you are recording videos.
We recommend you to get Sony A7II is you are a sports shooter.
Best Camera for low-light or available light
The Low light sensitivity of Sony A7 II is limited to -1EV and Canon 5D Mark III supports lowlight sensitivity upto -2EV, the other major advantage of Canon 5D Mark III is High ISO range compared to (25600 vs 102400), so best camera for available / low-light is Canon 5D Mark III.
The 5-Axis SteadyShot INSIDE Stabilization, This compensates for five types of camera shake encountered during handheld shooting of still images and video, No sensor shift IS available in 5D Mark III.
Both the camera records Full HD videos, but the Canon 5D Mark III Full HD is limited to 30fps and Sony A7 II can record Full HD videos at 60 fps.
The Canon 5D Mark III offers more battery life but the Sony A7 II is light-weight and easy to carry, the Sony A7 II features wireless connectivity
The Sony A7 II offers advance AF system and built in image stabilization compared to the 5D Mark III, so we recommend you to go with Sony A7 II based on specification comparison review.
Buy at Amazon A7 II camera [Body only] A7 II camera [28-70mm]
Buy Canon 5D Mark III From Amazon