From the pics posted, Bob makes a good case for Nasser in the front, I think he's right.
The back, as said, isn't close, Nasser loses - which I believe Bob agrees, but overall it should go to Francois. This disparity is enough to make such judgement.
As far as when people peak, it's all too, I hesitate to say the cliche genetic, but nonetheless true. You have your late and early bloomers and it's more an issue of genetic makeup than actual sport.