I have just upgraded to 8x8, but frankly what are the differences?
In Terms of what? What was the reason you did upgrade?
Welcome to the Community!
I use Jitsi as a f2f conferencing. When I was using community version, I could not record meetings. Recording got better when I just upgraded. I am interested on other functionalities.
8x8 is a subscription product which at the very least, offers more guaranteed resources. If your meetings have to be at a specific time without being concerned about availability of resources, 8x8 is the way to go.