In DevForce Classic, the Object Mapper will validate and update the mappings based on the Schema Update Options. DevForce Classic performs these activities by directly querying schema information in the database.
In DevForce EF, the Object Mapper will not perform this validation and update, because it does not directly work with the database, but instead with the EDMX file only. In order to have the schema synced with the database you need to open the EDM designer for the EDMX and choose "Update Model from Database...".