Possibly agree Froome not at the top of his game-this based upon his demolition of Contador in last year's TDF. Then again, relatively speaking Contador was way below his best last year. So, yes not much between them.
Hopefully we have a good few years racing to watch at the top end. Contador, Froome, Nibali and Quintana. 4 fighting for 3 GT's.
My guess is that Nibali will go for the Giro and Vuelta next year and not defend the TDF. He will know Contador and Froome will want the TDF and possibly add Quintana to that too.