I would imagine the Korean version you are playing with 4 balls is a little harder to learn at first, than the French version.I see them using 3 but haven't really paid attention to what they are doing with their balls.
Many basics with a high learning curve in french billiards while to my knowledge the Korean version has a similar yet different scoring system.
Someone correct my if I'm wrong but in the Korean version I think you get a point for hitting your opponents cue ball. So you can use it as an option for a carom.
But now that means you have more options for gather shots and it could be too much going on o think for someone starting out.
I'm not even close to an expert on the games but maybe @Bert van Manen will have an opinion.