Yeah stevev210 your on to it, they have grown a couple of inches this year so are in the same ball park as the other high end Ronix boots.
I have made the switch this year because of that fact and rate them as the best boot in the line, if not across all brands. Despite the height change the Parks is still super soft allowing for that effortless flex you'll be used to. The difference is noticeable when on that's for sure but in no way is that a negative, I found no difference when riding with the boots being that soft they feel amazing straight out of the box with no break in period.
I know a lot of kiteboarders were picking the lower cut Parks up so will be interesting to se if that effects their sales in that direction.