The XE is a slightly shorter and lighter version of the XF. (More aluminum body panels.) It looks much like it:
The controls are similar, but less similar than I would expect. The increasing iconification of displays and controls makes sense in a world without a common language.
This particular XE was a 2.5L turbocharged 4 cylinder. I believe the same 2.5L used in some X-types. Comparing this to my supercharged 3.0L V6, I can't imagine why you would pick this engine. The low torque of the 2.5L until the turbo starts means a very light push from the light. At 3000 rpm, the turbo screams, "I'm here, it's time to fly!" Poof: the engine is zooming and the car flies. But it doesn't seem even as quick as the supercharged 3.0 in my several hundred pound heavier XF. And in the 500 miles before I received it, it had averaged 21.5 mpg, much worse than my XF. Of course a demo car gets driven like a bat out of hell, so perhaps that's why.
While the speedometer goes to 180, there is no V8 offered, although apparently that may happen in the future.
Except that the back seat is even more intended for midgets than the XF, it is quite similar inside. AWD is apparently offered and was in this one I drove. Perhaps the lower price is the argument for the XE. Lower weight would make the supercharged V8 or V6 a bit faster than the XF. Handling is similar although I think the steering is lighter and less precise than my XF.