TN - it's very complex and mastery of the art of snobbery takes many years of intensive study.
I am a mere green belt in the art and I practise daily.
Rich - now I have an SE but a 35d engine. You have an M Sport but a 20d unit. So does M Sport vs SE snobbery outdo 35d vs 20d snobbery or vice versa?
As I said, it's a complex art.
E91 335d SE Touring
Also Land Rover Puma Defender 110 XS station wagon