-Safety Car
-Real Car designs(wings,steering wheel,etc.)
-DRS and KERS system
-Realistic F1 driving
-Realistic Career mode
-Mistakes can happen during pit stop such as tire jamming, etc.
-And no reverse. F1 cars don't have reverse on their cars
-Opponents make more mistakes such as oversteering, understeering, etc.
-Car performance always matter in each race
What I mean is In F1 2010 when you started career mode you can choose Force India,Sauber,Toro Rosso, etc. and you can still have pole position and win the race and beat Ferrari,Red Bull, and McLaren. I even won the championship on a Sauber car(not joking).