Nearly right after that match Ferrer dropped out of top 10, later even from top 20, and need exactly two years to come back. No way he's in the same form now as then.
Oh god. His form may fluctuate, but you know what doesn't? Dynamics. That's why 4 years later, Nishikori toasted an "in form" Ferrer a bagel en route to sending him packing at the Olympics.
He hurts him for the same reason Davydenko recently did in Doha. He goes for the same tactics Ferrer does with added firepower. He's not afraid to change directions, he looks to play inside the court, he takes time away from his opponent, and loves using that forehand.
When Ferrer faces guys like this, he struggles to maintain his own constructive offense and ends up scrambling.
But yeah, no, forget the nuances of tennis and dismiss everything as irrelevant because this Ferrer is too good.