I agree that the M3 sedan is not that impressive when it comes to looks, but that's not what I would buy this car for.

I don't understand this quote from the autocar article:
"But despite the added practicality it brings to the experience, the saloon lacks the singularity of purpose exhibited by the M3 coupé"

What is it about the M3 sedan that make it feel so different from the M3 coupe?