In 2002 Ford introduced the Ford Ranger FX4 package, which was equipped w/ the torsen diff, manual transfer case (except w/ the auto tranny), alloy wheels, and BFG AT tires (among other things). For that model year there was also the Ranger Off Road Package (ORP), as w/ years before that.
In 2003 Ford changed the FX4 package name to the FX4 Level II. What was the ORP was renamed to the Ranger FX4.
So what was the '02 FX4 is the same as the '03+ FX4 LII.. well, up to 2004 where they pulled the manual transfer case, even on the manually equipped trucks. So the 2002 FX4 is the same as the 2003 FX4 LII. And the 2003 FX4 (non-LII) is the same as the 2002 (and earlier) ORP.. ..Any questions?!