personally i think Mercs and BMW are fine. They have a standard
model and they just offer different engine sizes and a sports
model. For example, BMW has the 520i, 523i, 525i, 530i, 545i and
the mighty M5.
Whereas for Porsche, the 997 Carrera alone has so many variants.
You have the 2 wheel drive, 4 wheel drive, S variant (which also
comes in 2/4 wheel drive), turbo variant, lightened chassis variant
(GT3) and lately the lighten-lightened variant (GT3 RS). Man, this
is crazy 