I've ridden both and reckon the 06 depowers more than the xbow but they are completely different kites. I'd probably go with the type wave in waves and use the xbow in flat water for easy riding. The type wave is much faster and more responsive than the xbow too but I'd say hangtime on the xbows would be better than the type wave.
Have to say though the type wave looks a million times better than the xbow and the bar is alot nicer too

I hate all the dangly bits that come with the xbow.