It was a coin toss between the both but Perez has shown more potential this season, so Mclaren grabbed him.
Great news for Perez, he had a choice between Ferrari and Mclaren and chose the right choice. He will be a free man at Mclaren where as at Ferrari he would be a 2nd man to Alonso and have no hope of getting anywhere with there strict 1 and 2 driver ways.
We will find out in 2014 if Hamilton has made the right choice, supposidly Brawn has promised him a winning car for 2014 since they are ahead of the rest with the new V6 turbo'ed engines that are coming in 2014.
Say, i don't usually post here for F1 but I was surprised no one had posted about it.