It's difficult to say which of the top-three drivers in Formula 1 did the best job in 2012.That's the view of Nico Hulkenberg, who believes this year's top three championship finishers - Sebastian Vettel, Fernando Alonso and Kimi Raikkonen - deserve similar praise.CHOOSING FAVOURITESHulkenberg said: "Alonso and Vettel fought for the title until the last race and did a great job. You cannot tell which was the best. Both took everything from the car, and so did Kimi, who had a great championship after two years out."Spanish veteran Pedro de la Rosa, however, was more willing to choose a favourite. Asked if Vettel's three consecutive titles for Red Bull meant he was the world's best, he said: "I don't know... I think Fernando deserved it more this year because he was the most complete driver fighting with a disadvantage."Last year I think Vettel was above everybody else and we need to recognise that he is a great driver who knows how to win even without the very best car."Meanwhile Rosa thinks Red Bull's rivals have a chance to beat Vettel in 2013, even though the rules are not changing much."This year the difference between Red Bull and the others was much lower and in the first part of the year Red Bull was not dominant. The best cars throughout the year were McLarens - which should have won the championship, but was betrayed by reliability."