VFR Terrain is unique in providing both high resolution terrain mesh and  accurate and detailed coastline/lake shoreliness, certainly on a national scale, and the use of Visual Flight's pioneering multi-render mesh technology means that the full benefits of the 19m mesh are available without any of the potential drawbacks, as can be seen in the following animated sequence of screenshots of  VFR Terrain with VFR Photographic Scenery:

The animation shows two frames, the first at 38m resolution and the second at 19m resolution. ( If you're only seeing the first frame, make sure your browser settings allow you to view animated images). In the first frame, the concrete dam is obviously out of shape, whereas in the second there's a clearly defined straight edge along the top and bottom of the dam wall, giving a much better semblence of reality. If you then look around the shoreline of the reservoir, you'll see the lake edge with the updated FS2004 is much better defined, with no water textures climbing up the terrain, and a far more convincing overall visual appearance.