For your last question I would answer the Prodigy without a doubt. I did test the prodigy and razor back to back during the same session in strong gusty winds. It’s difficult to give an opinion on low end as I didn’t fly them together in light wind but you have some opinions above on that. I can tell you however that I tested the 9.5m Prodigy over a 3 month period in winds from 12 knots into 30s gusting to 40 knots and it gave me enough to free-ride bottom end 12 knots on a 134cm board, I weigh approx. 72kg. When I tried the razor in the middle of that wind range it ragged me around quite a bit and for what I need for speed riding “it’s not for me” might have been a few years ago though when I was fit enough for freestyling.
For free-ride and wave the Prodigy will be so predictable and have a BIG wind range you won’t go wrong, the Prodigy is the most forgiving kite I have ever flown since starting in 2002, don’t get me wrong though it’s not a boring kite either. I just got the 14m on demo 2 weeks ago and had a freestyle mess about staying up-wind and pulling tricks like back- roll kite loop and jumps with kite loops in just 10-12 knots. My opinion on the razor is that if powered freestyle is your thing it is the kite for the job otherwise you will find it needs your attention and input much more than the Prodigy does i.e. more technical.