No they never had the electrically motor operated ELSD in the WK. There was an electrical lockout signal to disable the hydraulically operated LSD when braking... so it had some electrical control. LSDs can interact badly with ABS.
Back in 2010-2011 Jeep demonstrated a comparison, perhaps a better than average google search would turn it up.
Subarus are fine if you want a car. If you can provide some credible road test comparison references that shows the Subaru system is the one to beat in 12 inches of snow, deep mud, serious trails.... while towing a 7000 lb trailer, please do... well maybe not the trailer part
. There has been a recent test that shows the both Audi Quattro and Volvo system superior to the Subaru on the road... They all have specific situations where they may be superior, and one may be better for you than another, depending on how you intend to use the vehicle.
Think about one of the disadvantages of LSD without other augmentation. You can easily get both wheels spinning on an axle which is much less stable that the BCT pulsing kind of spin, like ABS it is more stable. If you search back through the forum about driver impressions of a QD equipped vehicle, I think you will find nothing but amazement. You tube is full of examples.
If all you are doing is driving on plowed roads down to the local mall and back, any AWD system will work just fine.