The 3D displayed in MapBrowser 3D viewer is Cesium format.
Exported 3D should have a very similar appearance to the 3D viewed in the Map Browser. If you are viewing the same capture, it will be the same content. However different formats and applications may display the extracted 3D in slightly different ways, which may make the content appear to be different.
To view all the 3D types available for export from MapBrowser, read this article: Export 3D.