Is the official WP 8.1 update available for the Lumia 920? I am still using developers preview

[Windows Central Question]

Also, what's different in the official one, and the preview for developers version?

 

[N_LaRUE]

I think that may be a question of what country/carrier you are on.

You can check here - Software update for Nokia Lumia with Windows Phone 8 - Nokia

The main difference is you get the Cyan firmware. DP does not have the firmware.