It is subjective to a point. There is an undeniable science to beauty which supercedes subjectivity. With that said, you claim Kana comparable to the A-listers). Well, if you're going to make such a claim, you'd better make sure it's true.
TER reviews - averaged scores (looks/performance) - minimum 5 reviews
These are what I would consider some of the A-listers in NYC Korean GFE houses:
A-ya - 8.6/8.7
Ivy - 9.0/9.0
Daisy - 8.7/8.5
Scarlet - 8.9/8.0
Gina - 8.5/8.1
Compare those scores to...
Kana - 7.8/7.7
Olivia - 7.3/7.1
They are clearly in a league above your two girls, which is fine, because they are priced accordingly. Generally speaking, you can't expect to get the same caliber of girl at $250 that you can at $400. There's a reason why they're almost half the price.