The Mountains are a little wider and peaks a little taller:
The forests are denser:
The flowers are in much more abundance:
But the coolest part of this mod is that it not only enhances the default world generator but allows you to create many other worlds outside of the default generator. You can create worlds that take on the look of what Minecraft looked like in the Alpha Stages and you can even create massive worlds in the sky. There’s a lot this mod has to offer in terms of world generation.