this is what a friend wrote to me, when he was in Barbados, flying his new ozone V4 and switched onto an SS for testing both were 9m, on a strapless board:
"SS: a lot of barpressure and really strong pull downwind, it develops too much power when looping or flying fast turns for example.
when tacking with a loop it just lifted me of the board."
his biggest kite is an Ozone Reo V4 9m he or foils or adapts the waveboard to the conditions, he has 9 8 7 6
He is a skilled 80kg 1.80m waveboard rider, he had Fone, bandits, he had North then he purchased Ozone reo V3...but finds the Reo V4 the best one.
I can only agree with him, I had the REO V3 myself, and was not as happy with it, now with the V4, it is soooo smooth, low barpressure, and max depower in a short barthrow...I am not going to buy any Reo V5 without testing and if no improvement, I just stick to my V4 no overpower within the looping etc...
To me you cannot go wrong with a Reo V4, but would advice you not to buy a Reo V3 even if they are cheaper
hope this helps a bit