Rafa is more of a favorite to win RG than Djokovic in my opinion. Djokovic is yet to beat Rafa there, that's a point that cannot be overlooked. Secondly Rafa is better against the field than Djokovic is against the field. The chances of Rafa losing before RG final is very less while that's not the case with Djokovic. Roger took him out in 2011 while Seppi played five setters with him in 2012 and on top of that Tsonga was on match points against Djokovic in last year RG.
There is an artist in Roger Federer who expresses himself best at the Tennis court