Yesterday (Lowwind 8-14 knots) and this morning ( stronger Winds 12-20 knots ) I checked out the new Echo wing 5m ( my weight 64 Kg )
It have a lot of Power, pums very well and give you a good speed to come up on the foil. The only thing in my opinion is, when you depower the wing in ( full power option ) it start to push against you ( i would call it frontstall )  This never happend to me on the F-one Swing
In the stronger wind i trimmed the wing a flatter profile and it was much better and faster.
I never tryed  the first version of the duotone wing.