Dont trust a sellers description of a vehicles model and spec, even if they are being 100% honest there is a good chance the car has been erroneously listed by DVLA or misrepresented when sold to them. You would be suprised how many M-Sport or S-Line models left the factory as SE or ES before they were fitted with spurious alloy wheels and foglights.
In commercial vehicles there are too many model variations for sellers to keep up with and its not uncommon to find a vehicle described as a 3.5 Tonne GVW Tipper actually turn out to be a 3.7 Tonne GVW Dropsider.
We use a number of specification checking resources to make sure that the check we provide is most accurate to your exact type of vehicle.
Of course we double check all spec whilst physically testing the vehicle.
You can expect a printout similiar to the one below from Motorspecs or in other cases we use CAP, HPI or Parkers.