Based on what I was able to glean from my measurements of the JL mules, the track with is 63.9". This a two inch extension over the JK's measurement of 61.9", however it still falls well short of the RAM's 67.1" width.
The spare tire appears to have been lowered for improved rear visibility.
The trunk handle is now inline with the rear lights.
The rear bumper has a more interesting, aerodynamic design.
The rear window appears to be larger.
The fenders clearly have a higher rise than the JK's.