My info might be very dated bc I've only sporadically mongered in LA Korean scene in the last decade or so, maybe 1-2x/year. But the Korean girls I've seen there were generally younger, hotter, and with a bigger menu/service on offer. I generally went to apartment complexes in K-town, mid-Wilshire (near The Grove, usually in one specific apartment complex that seems to be half filled with hos), and occasionally Santa Monica.
I just found this twitter site that has a LOT of LA girls listed.
https://twitter.com/BookerGray7