Ever since the 7D Mark II was announced, the big question on my mind has been "How does the 7D Mark II AF system compare to the best-ever-prior AF system found in the 1D X and 5D Mark III?"
The 1D X and 5D Mark III AF systems are easily the best I've ever used and my in-focus hit rate when using these cameras, especially with subjects in motion, has never been higher. Then the 7D Mark II was announced with even more focus points (including a higher number of cross-type AF points) and many of the same or even improved AF features found in the 1D X/5D Mark III.
To answer this question, Chuck Westfall (Advisor, Technical Information, Canon USA) was gracious enough to prepare a detailed technical comparison for us. Chuck's information is a must-read for anyone choosing between these three DSLRs: