No real advantages, but if you already got trained, why not save the hundred bucks and put it toward a regular kite?
The B2 is fine for learning kite control. Heck, any kite that is set up on a bar system is fine. Once you know kite control, the rest is being able to control power and balance while on the board moving.
Maybe you should get like a 12m or something, a smaller kite for use in higher winds on the water, but a kite you can learn with on land in light winds for now, until you're good enough to go out in higher winds.
That way, you can learn on a real kite, it won't be too crazy in terms of power, and when you get better, you can use it in higher winds?
Otherwise, any training kite will work...