LA (Not LJ) is just being published by Mongoose (well maybe if they give them a manuscript eventually). It is not owned by Mongoose. The rules are staying the same from the original published, with new material and some tweaks added. It would not make any sense to put out a new game system if it was just the same as another game system.
The setting for the game LE is written so generic that it contains no stats at all. So it ti compatible with any fantasy rules you want.