Should they have the same coordinate values? Thank you.
That is quite some difference - about 6 hours!
Things to check out - location coordinates, time and timezone in both systems.
I am not familiar with StarGo but you might also want to check what Epoch it assumes for the display. If SGP and Avalon are using different Epochs, you may get a small difference…
I think location coordinates, time and timezone are the same in both systems. Using Cartes du Ciel, for example, this difference it does not exist.
just a thought - you may have set up your location in SGP user profile - but is it being applied to your sequence. It will appear top middle of sequencer window.