I would like to know your recommendation for which tool has more advantages when it comes to BDD development process:
I personally use Cucumber (on Ruby for Windows), also it seems SpecFlow is very similar. But I would like your recommendation on any other nice tools!
You could add MSpec to your list. MSpec is my personal favourite simply because I've used it more often/regularly. Which one you chose is, as with Unit Testing frameworks, mainly an primarily a matter of taste.
Take a couple of them out for a test run and decide based on: