Ladies who are Japanese - or who say they are Japanese - seem to be adopting a strategy across the West to set themselves apart from other Asian ladies.and demand more recompense. Haruko appears to be an exception to this trend.
The first attempt at this in Winnipeg was a failure; Hachi turned out to be a poor provider, by the majority of accounts on this board.
Most of these ladies are including a video service (for an additional charge). Speculation here is the ladies are insinuating they are high-value Japanese AV porn stars, without actually saying so (or even actually being Japanese AV stars).
IMHO Japanese ethnicity is a sign of a usually high quality SP, the same could be said of the more numerous Korean SPs. The Japanese seem to be testing the idea they are significantly higher value than Koreans, or any other Asian ethnicity.
I would say pick your lady based on her personal rep, not a marginal price difference. However I also notice the Japanese ladies are using different names in different cities, likely a branding strategy to identify themselves by their ethnicity rather than their personal reputation. To overcome this, I do an image search and often trace the lady back to a different name from some Vancouver agency, then look to see if she has a review in the Vancouver forum.