In reply to Slava Abakumov.

Regardless of how Distributor would handle this, if you found yourself in this situation, it seems like you're probably Doing It Wrong. It's not meant to transfer data between any two random sites; you have to intentionally connect both sites to each other and set up the push/pull operations between them, so it's assumed that the data is supported on both sides and meant to be transferred.

If the sites happen to share a CPT name but with otherwise-incompatible data models (taxonomies and custom fields) then I can't think of a scenario where you should be connecting them and trying to push or pull that data in the first place.