It’s late in the day, so I might just be missing something.
I am testing the WPMUDEV Hosting and actually managed to restore a Snapshot from a different domain into the WPMUDEV staging site by uploading the script and backup file.
Some data has definitely restored into the staging site.
However, when trying to access wp-admin, I am redirected to the original domain at my other host. I can also confirm that the original theme of the front end is not activated by the snapshot.
According to my knowledge a snapshot restore usually updates everything, including new domain urls, or am I missing something?