Common to both was that they needed to know what they are selling, and this is what differentiates a good sales experience in any shop.
If you speak to a salesperson and they don’t know less than you do about the stock they have, or what they’re selling its always a urn off. Knowing what insurance group a car is in maybe pushing it a bit, but not being able to substitute a 107 with a C2 or Fiesta seemed like a shortcoming.
The supercar salesman was expected to know his product inside out, whereas the guy selling the cheaper cars didn’t know what was in stock. I don’t think it was important for him to know the detail of all that stock, but to know what they’ve got seemed very important.