This is cool to know that you are looking at Cuelux for an alternative from Daslight.
To answer your questions:
1- Cuelux is 1 universe
2- Cuelux include a wide range of plug and play midi maps
3- Cuelux Doesn't have direct sound to light, but you can tap a tempo that the chase will follow. We think this is more accurate that sound detection, and it include a break function when you want to "freeze" your lights.
4- Cuelux doesn't use palets, only Cuelux Pro does.
I hope those answers will help you in your decision.