Bay area K-girls are not necessarily hotter than NYC but there are a lot of them. PreCOVID I used to travel to the Bay area at least once a month and notices that more than half of them are traveling on visitor visa, kinda like what jgirls are doing. I had maybe half dozen sessions with a really hot j-girl but most were about the same calibre as NYC in terms of looks and service. I think average age is bit lower in the Bay area.
My first BBBJ was with a J-girl in San Jose apt amp and surprised the heck out of me as NYC amp always used cover, that's about 7,8 years back.