I suspect Eddie is having a little fun. As to whether or not the last of the Special cars is a Charger or Challenger, we can't say 100% for sure, can we?
Dodge likes to stir the pot with these ads: The more people that make a guess, or assume they know about one their new vehicles - the more interest there is. Marketing 101.
Truth be told, and it should really be obvious, it's a Diplomat.