Exported predictive model zip has totally different format versus R-A-P, it is only used for Pega decisioning model import/export, predictive models are specific Pega Decision Hub and are NOT rules. If you expand the exported zip files you will see the difference.
Correct. This project zip contains the complete machine learning project for building the predictive model(s) and the export/import can be used to transfer projects between different design time environments. The final result of such a project is a predictive model rule. Only the predictive model rules are transferred to (pre)production environments, as all other rules,