I have...
Your looking at 3 very different kites here...

Fuel is an all out performance C kite - Huge boosts, fantastic wakestyle riding and a crisp, lively feel. Not much depower though, and less overall power, you'll need 1 or 2m bigger than a Switchblade. Great kite if you want to be unhooked for all your moves...

Nomad is a wave kite - great for down the line wave riding but for unhooked freestyle, needs to be mega powered up. It's almost tooo fast to turn for wakestyle moves - even on the slow settings. Plenty of depower and pretty easy relaunch in enough wind. Great kite if you want to do a bit of wave riding, freestyle and general freeriding...

Switchblade is a user friendly wakestyle kite - Great for just cruising, wakestyle moves and old school freestyle. Super easy relaunch, almost automatic in above 16 knots. Fair amount of bar pressure compared to the above 2 kites, and you still get that super powered feeling when you unhook. If your used to a kite that pulls hard when unhooking then you'll be fine on a Switchblade. It does work for wave riding - but a Nomad will be nicer.

Quality on all 3 is similar - with the Cabrinha bar being a touch nicer to use with its internal safety line and awesome IDS safety for 100% effective self landing. Materials used are the same, same kind of workmanship on both brands.

I've ridden a lot of kites this year - and the Nomad still ranks highest in my books - with the Ozone C4 being close behind.