While not exactly a straight comparison (it's not Casey's debut season in MotoGP this year), this year has been sort of the year of the rookie for both MotoGP and Formula 1.
Casey Stoner has benefited from the top speed of the Ducati GP7 and the competitive Bridgestone tyres, while Lewis Hamilton has been able to keep up with the current World Champion, Fernando Alonso, in the same machinery.
It all makes for the most exciting racing in years for both series...