Khabib is closer to DC compared to Cain in terms of their fighting styles and skills in the ring. Cain actually didn't mind standing and trading with opponents who were great strikers in their own right, such as boxing and outstriking JDS on his feet and even against Werdum he managed to hang in there standing.
It's just that Werdum stylistically was a bad matchup for him since Cain didn't really have the option of taking him down and even on the clinch Werdum didn't even mind that either since Cain had to eat knees because of that. Cain also preferred to finish pretty much all his fight via GnP and strikes while Khabib usually finished his fights via grinding/wearing his opponents down along with his lethal submission skills.
DC, like Khabib, had great wrestling skills and didn't mind finishing fights via submission as well, although DC can only do this against opponents who were mostly out of their elements on the mat. At least DC had better stand-up than Khabib did and faced opponents who are usually bigger than he was.