It should do, someone should be able to compare them. I think the guy who posted this https://www.youtube.com/watch?v=YS7179f5E2Q
said it was faster than the speed4.
Low end is tricky, if you are expecting to get a lot from just a kite you will be disappointed, you need both a better board and kite and skill and knowledge to go really low. If you are getting a hydrofoil then yes the 22 is probably too much unless you are trying to break records
. If you compare your weight to Regis he is 60kg and uses a 12m Pulsion from 3-4knots on a hydrofoil. 75-to 80 you get 15m kite, 90 becomes 18m, heavier gives you 22 though. I will say, even 12m you will want in ultralight fabric, that is if you want to hydrofoil or surf with it, though I am not sure about surfing with the aurora2, especially 12m is small. 6knots is good now for inflatables, but even standard fabric foils have been good till 5knots static 4knots continually flown. The lighter ones go even lower, it is debatable how exactly low they can go, but I think flying down to 2-3 knots is possible. They can be modified to have a lot more lift at the sacrifice of upwind and stability, which makes things possible that are not without it. I have ridden on a surfboard when hydrofoil and race foil could not.
Yes the hangtime on the Element is far from good, like most wave kites. I could say a number of other things about it and few other kites but I won't. 15 to 20, it depends on weight and board. You know toby only uses an 18 up till like 30knots? Some of my biggest jumps were near 30knots on a 15m speed3, done some good jumps in 45knots but on an 8m. hardly say those situations were practical for oldschool. I will say the 22m gives some very impressive hang in 15knots and then quickly feels like it'll kill you in 18knots.