I need 10+ mph to get moving with the Super Blast (I think this is basically the same kite as now sold as the Blast 2-4, i.e. it can generate about the same power as a 4m foil).
The twitchiness does make it a pain to fly with, although I tend to be buggying with foils if the conditions are good - so I probably haven't seen the best that it can do.
I haven't flow a C-Quad, but I suspect that the Revolution 'brake' control will be different - most quad line kites fly on the two power lines, with the brakes adding control. Rev's need to be balanced on all 4 lines to fly - which is a strange feeling if you are used to foils. (It is hard to explain how different it feels - there a couple of videos on the Rev web site, that would be worth a look if you haven't seen them before.)