They're both good kites, it will all come down to what sort of safety system you prefer, and what sort of performance you're after....
The switchy is a 4 line kite with a push-up safety system located on the bar itself (people seem to like it as they ride with their hands on their safety) and comes with a one-pump system.
The Rebel is a 5 lines with a standard quick release on the chicken loop and it has separated inflation points for the struts.
The boost is a lot better with the Rebel (jumps higher and longer hang time), both are super easy to relaunch and have a similar wind range/depower....
I personally prefer the Rebel (feels more like a "C", always liked the 5th line system, the boost is wicked and I prefer having my struts separated from the leading edge: a lot of people like the one pump system (it really only saves you about 30 seconds when rigging...), but fixing kites quite often, I really do prefer having my struts separated (fixing a one pump system leak is a nightmare... me think...)).
It will really come down to what YOU feel good with (people who fly the switchy will tell you to go for that one, people prefer the Rebel will tell you to buy it. I believe they're both good kites...).
All together, you can't go wrong by purchasing any of those two as they both had excellent reviews this year.
My call would be to demo them, as they still do FEEL very different and find out which one YOU are the most comfortable with....
Take them both for a go (most of shops nowadays offer demo before purchasing), and within 10 minutes, you will know which one's your buddy...
Hope this helps...