I have really enjoyed both games. I think the main similarity is their is a lot of disasters you are suppose to work together to overcome. In Red November as stated in a previous post you don't have to deal with a traitor or have skill specific characters. Red November is definitely faster paced and has some better humor in it and definitely worth the price of it.
Just bought the game today and tried. I'm new to the ffg forums. It was a blast and only played with 2 players one gnome a piece. It never got all that difficult in playing just the two of us so later I played around iwith about 4 gnomes myself and seems much better that way.