There's information as well as subjective viewpoints on every kite known to man at Kiteforum:
Kite Reviews on Kite Forum (you will have to create an account to view the ratings)
Yesterday, I wanted to look at other's scoring of the GK Sonic 11 and the Best Waroo 9 to see how their views compared to mine. What I found was that the other reviews and ratings were very similar to my review - there are good to great ratings for both, but there appears to be a slight preference for the Waroo overall (for me as well , IF the wind is really strong).
The average scores are :
Waroo 9 - Rating = 9.25 out of 10 - The waroo gets high marks for anything regarding handling
GK Sonic 11 - Rating = 7.00 out of 10 - the GK gets high marks for lift and low bar pressure.