Thanks Hamish
I think it's a different experience, yes it's an improvment in faster focus, the Evf on the XT1 is almost optical in quality, it's strange you feel your not looking at an electronic display. Having said that I shot a couple of hundred images on the X pro and shooting side by side, you can see the differences in speed, but the X pro is such a nice camera to use, it feels somewhat simpler to operate if that makes sense.
The X series has grown up a little with the XT, bringing near DSLR performance to a mirrorless camera. I fully expect the X Pro 2 to be equally as good if not better that the XT, especially with the organic sensor and my bet would be at least 24mp. I'm not sure given the quality of the EVF on the XT, that an optical finder is needed anymore, as most of the new large zooms don't work with an optical finder, but shoot a small fast prime using the optical finder is a great experience.
As much as I like the XT, the X pro still has that rangefinder feel, and is still a very capable camera. The firmware upgrades have made it much better than when it first launched. Personally both can shoot weddings all day long, but my trust on focus and speed is in the XT you will not miss a shot.