These cameras all sport the same sensor and should exhibit identical dynamic range. The sensor, as I noted in my reviews of both the X-Pro and X-E bodies is really excellent. I didn't attempt to test DR, since this is almost impossible to do meaningfully in the real world, and depends on getting as close to perfect an "exposure to the right" exposure as possible, but I could see nothing lacking.
Perhaps the most useful answer is this: if you otherwise like the Fuji "X" cameras - and there is much to like - there is nothing about their DR capabilities which will disappoint you.
- N.