Has the same sensor and processor, but different in term of design and additional features. X-Pro2 design uses rangefinder style while X-T2 using analog SLR-inspired FUJICA ST style. Additional features that embedded in X-T2 and not embedded in the X-Pro2 are:
A video recorder features, a video recorder that capable up to 4K while in X-Pro2 is still limited to Full HD 1080.
Performance Boost features that using Power Vertical Grip which will increase the 4K recording time, increase sensitivity Auto Focus lock function, and speed up the overall process of the camera.