I was doing the same question than you a time ago.
If someone told you Evo and Dice there is no much difference then is wrong.
Dice is the kite that will push to use/leanr more techniques, it is different how you jump with the Rebel, Evo and Dice.
The rebel it is very friendly forgiven kite, it is a specific kite for jumping and really good for upwind, you dont need much technique for jumping, the bar pressure is higher. The dice you can really boost, get speed, edge your board and jump, you can go for waves and you can unhook light bar pressure, and to be honest a dice 12m for me loops equaly easy than a rebel 9, Dice is also a loop machine, it seems that the kite is asking you to loop him everytime
Evo is between Rebel and Dice, you can unhook, jump easily, good hanging time, it handle best on gusty condition But first if you want to unhook Dice is the paradise, also for jumping can jump high, hang time is not so good like rebel and evo and you need to heli loop your kite if you jump over than 7m sometimes or use more techniques for landing.
Dice is my favorite kite at this moment, it push me to get another level.