what is the difference between these two sites?

they both recommend ver 1.8.6 when you click on the 2.0 download

seems funny they put out ver 2.0 but recommend 1.8.6 ??

Ruby version 1.86, Rails version 2.02. Ruby is the language; Rails is the application framework (a collection of Ruby code) that is written in Ruby.

Um, what?

You do realize that there's Rails and then there's Ruby?

Rails 2.0.2 Ruby 1.8.6