I've ridden all 4... but not the Bandit 3
Switchblade 10 & 12
Waroo 11
Riot XR 11
Octane 11
Switchblades are the power kite of the 4, the 12's got 3-4 knots more low end than any of the others... Can't fault them, use them in the school, but our team riders use them as well! Says something about their versatility...
The Waroo has the best relaunch and general ease of use... But it's quite a heavy kite (weight wise) due to the twister tech, battens, thicker struts/LE and heaps of little things that add up like the deflate valve on the wingtip - so it lacks a bit in light winds... Will be great in the smaller sizes in windier conditions, or powered up...
The Riot XR is very similar to the Cabrinha Nomad - fast and nimble.... Less depower than the other kites and a little harder to relaunch... Great wave/freeride kite...
Slingshot Octane is pretty different to anything else i've ridden before, on/off power in an instant... Huge boosts and plenty of hangtime...
I used it for a lesson today and it was fantastic - great relaunch, stability and depower...
A great all rounder, but put aside some time to get used to it...
Hope this helps -