I haven't tried the SB but I've been riding the bandit 6 for a couple of months now (9m and 12m, haven't got a chance to unpack the 7m yet but march is coming fast.
I do self launch and tether launch at ocean beach and I never had an issue.
the kite stays parked where it should be. The kite sometimes gets elevated a few feet off the ground on a gust but it doesn't pass the edge of the wind window and fall on its side: it just slowly drops back on its wing and stays where it should stay, ready for you to launch it.
I find it more predictable and soft in the gusts than the bandit 5 but still as light and fast.
boost and hang time are more in par with what the bandit 4 offered in the past, more of a plug and play if you will (which I found the bandit 5 lost a little).
So far I love it.