...I think the ETA base that most directly matches up to it is the 2892(?). As to how they compare I don't know enough about the A10 to comment, but I've read elsewhere that the basic A10 ebache arrives 'from the factory' better finished than the equivalent ETA ebauche.
I think Panerai uses a Soprod caliber in their Luminor Power Reserve (and maybe other models), I don't know if it's the A10 though.