D7500 auto focus speed and tracking??

I am looking real hard at the new D7500. For those who have used one how is the auto focus speed and focus tracking? Having a lot of features from the D500 camera how does it compare to the D7200 camera for auto focus especially? The last Nikon I had was a few years back was the D7000 and it was nothing special. Fast auto focus and tracking I want for wildlife and birding photos. Feedback appreciated.
Thanks Bill

You should add to that question what lens are people using, it can have a major effect on these things.

It will come with the 18-140 kit lens. Looking at the 24-85 F/2.8 and the new 70-300 F/4.5-5.6E ED VR lenses.

Thanks Bill