hi j
the synergy is alot faster size for size and has a massive amount of float aswell. the wind range is about the same 12-28mph. the bad side of the synergy is it tends to drift abit about the window whereas the phanny will sit there all day without any input. ive flown both kites back to back and my first impression was i prefer the phanny. (this might be because i was so used to the kites characteristics) but after flying the synergy serveral more times, it wins hands down!! PL definately got it right again!!!