As Thread title say, Should I upgrade to Kali Linux 2016.1 version from Kali 2.0 ??

I mean Kali 2.0 looks awesome to me, is Kali 2016.1 better than kali 2.0 ???

Please share your thoughts. I want your opinions !! Since I am going to Download 2.6 Gb on my Pretty slow internet

Right now I only use Kali with Live Usb !!!

Also is there any way to save Updates & sessions in Live USB persistence as I am able to save only files on Persistence drive !!

Thanks in Advance !!!