Cut Lizzie some slack. She is a woman, so one car will look exactly like any other.
Now when I was a child all cars were very different in design, although the colour was usually black or grey, with some reds creeping in.
Then came the awful 1970's and designs started to all fall in line, which got much worse in the 1980's!
Now I have to look twice to recognise a car is a Jaguar, Bentley or Aston Martin! With the "people carriers" it is even worse, with Vauxhall's looking like Honda's, looking like Seat's, looking like Ford's......etc, etc, with basically the same overall shape, lights, wheels and so on!
Gone are the days of a Humber Snipe, looking so different than a Rover P4, looking so different from a Vauxhall Cresta PA, or a Vauxhall Victor, which in turn was nothing like a Standard 8, or Austin A30, or Austin Seven, and so on.....
At a distance it is not just women who cannot tell the difference between the cars; I have heard male police officers debating what car that they had just seen, and purely found out by the reg. no!
It is the same with the railways; Every steam engine type was recognisable; a A4 was very different to a Duchess, which was different to a Black Five, or a Merchant Navy, or a 9F. Then it just became 'boxes on wheels', all looking the same from a distance.........just as with the motor car!!