Addon Errors - no connection possible

I see I installed it from that thread: [TESTING] Kodi 17 (Krypton) Beta Builds for all platforms
and now was looking in this thread [TESTING] Kodi 17 (Krypton) builds for Raspberry Pi (continued) - #860 by propergol

I don’t really understand the difference? is the first a more stable beta and the second nighties?
Why is the number higher in the first version but it seems to be older?
How can I change the the second one?