Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
If you read the descriptions for each on their respective websites you could probably answer that question yourself. UTX USA is a complete makeover of "textures", landclass, waterclass, rivers, coastlines and roadways based on current highway data. FSGenesis HD Mesh is the "framework if you will that those textures are mapped to. It supplies the Highs and lows of the physical terrain you fly over.I'm looking at enhancing the terrain for FSX and was wondering what is better Ultimate Terrain X USA or FS Genesis HD Terrain Mesh for the United States?