Does anyone know if there are any differences between the ks version and the retail version?
The ks version comes with some extra expansions that can be purchased directly from Gamelyn games after the fact. Backers are getting mercenaries, which are heroes that anyone can hire but are available in a first come first served basis. There is also a wandering nomad variant expansion that essentially adds a neutral player. Other than that the versions will be identical. Gamelyn doesn't do Kickstarter exclusive material, but they generally add in a few things that will have limited availability but can be purchased by anyone who wants it.