ALTER TABLE MOVE ( Block- or row-oriented ? )

[Orca777]

Hello, my Question is:
Does ORacle move the table-segment database-block- ( due to higher performance ) or row-oriented like an normal INSERT-Stmt.

This question is important, because if MOVE works only database-block-oriented then Reorgansiation would not change the filling-grade of the Databaseblocks.
Then exp/imp shpuld be prefered.

Orca