IF I had to wage a guess, its due to the timing of the release and the economy.
Usually manufacturers set a price in each specific currency for that market and then leave the price static no matter how the economy chages on exchange rates and such.
So at the time of the KP02A release I am guessing they felt they needed to offer a more competitive USD price due to the poor exchange rate.
It would be interesting to see what the exchange rate was on the date that the KP01A price was set.
Looking at Euro/Dollar exchange rates, it was comparatively low in June of 2010 and high about a month ago. Timing maybe? Also, it could be simply that Kaustic wishes to make a bigger splash in America and is willing to cut margin per unit in order to sell more units to America.