Not a single engine has forward or cross compatibility to another engine except other engines within the same company as it would be incredibly difficult to do so, as they would have to maintain the code to port to the other engine constantly, not to mention the licensing nightmare and lack of being able to cleanly convert some things that dont exist/must exist in the other engine ex: Ue4 materials. The 3d models used in the maps are universal between platform and engine, though.