DigitalRev (without Kai) shared its Fujifilm X-T2 First Impressions on youtube.
I recommend you to go directly to minute 6:00 to see how the X-T2 compares to the X-Pro2 when tracking a flying drone. The X-T2 has been set to Electronic Shutter and 14fps shooting (no blackout).
From their conclusions by tracking the drone:
“It’s amazing. Only 1 shot was out of focus, and it’s purely my fault! With this Autofocus System, Fujifilm has a winner in their hands! I had a lot more keepers with the X-T2 compared to the X-Pro2.
For Sport fans: Get excited! The X-T2 is exactly what it promises… and a little bit more“
They also say the larger Viewfinder and refresh rate helps so much to better track the subject.
I remind you that Fujifilm said that the X-Pro2 will get the new improved AF-algorythm of the X-T2 in a Firmware udpate on October. So I guess there won’t be such a significant AF-discrepancy between the two flagships after the udpate. However, keep in mind that the new Fuji X-T2 AF-Tracking Custom Settings will not be implemented on the X-Pro2 via Firmware update. So for sports, you better go for the X-T2.
And get a grip, too :-)