With the different heads in '93s, they produce more power than the '94-97s, but are still no match for the ZE.  Note how Ntruder's curves are identical to mine until just prior to peaking.  The ZE on the other hand, makes more power and torque everywhere and then still improves on the '93 KL-03 on the top end.  This is probably a combination of the higher compression and different cam grinds.  You can also see in this chart how badly the VRIS points are effecting the curves.  Note the large dips in the HP/torque curves of the ZE, while mine and Ntruder's are much less pronounced.