Differents between nui 5.* and 6.*

[Dragonmagister]

Hello K. Scott Piel,
what is the main difference between the two versions NuI, which I mentioned in the title?
Clear that this is an alpha version, but where is the difference. Version 6 is better than version 5? And when the official version 6 will be available ?

Greetings Dragonmagister