My judgement is based on following grounds:

This year is special because one car has a very new architecture. The Toyota iQ is thus placed out of competition, facing a bunch of good cars much more conventional. The Peugeot 3008 and then emerges through its future hybrid version. The Opel Astra is a serious product, but managed at least surprising result of the Insignia which it takes a few features. The VW Polo and Mercedes E-Class is a credit to the German construction for quality and reliability of their achievement.