QD has 4full, neutral, and 4lo 50/50 lock.
SelecTrak (242) has 2hi, 4full, 4hi 50/50, neutral, and 4lo 50/50.
Not better or worse, just more options. You swap in the 242, and retain the limited slips - best of both worlds.
I'm actually trying to find an 02-04 Overland. Good to hear...