Fujifilm increased the size of the grip from the X-T2, which gave it room to move to a modern shutter button, away from the old-fashioned button with a cable-release socket.
The cosmetics are a little different and the thumb rest is a little bigger, but the most notable change on the back is the addition of an AF-On button. It also has a slightly more pronounced thumb rest, where the now more easily reachable quick-menu button lives.
