As far as logic is concerned ? No. In DQK, for instance, random patrols have 18th-level wizards with them and warriors with more HP than your average dragon.
The joys of high level AD&D.
I think the two sequels to COK are superior in just about any way.
Much better encounter design: no "MONSTERS ATTACK!", and generally much less random encounters. But silliness is almost impossible to avoid in high level AD&D.
Allied units and Knights' ability to lead them (but why the Solamnic Knights in DKK have evil alignment is beyond me).
Less linear, and more interesting overland maps, especially DKQ with all the optional quests, and hidden areas and encounters to find.