Besides superior off the ball movement, his other advantage over Rakitic is that he always plays with face towards goal. People complain about his backpasses, but whenever he receives the ball he's always able to turn around and asses the situation, while for Raki receiving the ball with back to goal means guaranteed backpass. Also great at pressing. Hope Valverde understands that and gradually starts to rely on him in serious matches. Against hard pressing teams he will be miles better than Raki.