X-T10: Fastest AF among all Fuji X cameras, small, light, NO weather-sealing . 6 FPS. X-T1: AF could be as fast as X-T10 after FW 4.0 update, big, with weather- sealing. 8 fps. The grip is actually very important for the small body, yes, just a handgrip with no battery compartment. With $400 price difference, X-T10 is more appealing. At $1000 range, Sony A7 series have more bangs for the buck.