Shopping for new there for my van, 235/50/18 or 255/45/18

Looking at mytyres the list them mostly all with this new label showing rolling resistance, wet grip and noise levels.

There's a nankang that fares really well with scores of c and b for rolling and wet grip.
72db is a good score too.
This is comparable to the premium tyres at double the price.

Is this new scoring system to be trusted, or like the twin air mpg figures to be taken with a pinch of salt?

Anyone know?

Cheers,

Deeyup

Self policed and tested i'm afraid,so i'd go on recommendations instead,HTH.