Answer
They're exactly the same — Aurena is purely a different user-interface layer on top of the identical underlying database as Enterprise Explorer; the same views/tables back both clients identically, with the same columns and data types. There may be a small number of additional tables used only to support Aurena-specific UI features, but these don't affect standard business-data migration efforts — migration templates and techniques built against IEE's table/view structure apply equally to data that will be viewed through Aurena, since it's the same data either way.