On the FTX site on the Iceland Demo info page they have a link to an 11 minute video that shows a comparison of default Icelandic scenery AND FTX Global.
Please note this demo also includes mesh, landclass and vector data, but video does a nice job of adding the layers one at a time so you can see how all all of it works together to upgrade the quality of the scenery.
Here is direct link to the Video: http://www.youtube.com/watch?v=pCNtM6YxgEk
Here is a link to the demo: http://www.fullterrain.com/product_ftxgiceland.html
Hopefully this helps.