From past discussion, it would be less money and aggravation to trade your WK2 for one with QTII. Its more than a transfer case. Its at least one traction control box, perhaps some console switches, ECU software and ABS software/hardware.
There were a couple attempts discussed on the Commander forum, which has similar components, and it was not completely successful. I think they gave up when they couldn't figure out how to adjust the ABS. The system detected a fault and disabled.
Wrangler vs WK2 is subjective. The wrangler provides off road capability for the most rugged trails but the WK2 is much nicer on the highway.
The WK systems are similar to the WK2, especially in later years. You may want to check out that sub-forum.
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