Churchill Tank Model, One Too long - Which is Correct?

Lert: The Mk I is a HD model, and made to higher standards of accuracy than the SD models already in the game. Especially older ones. Ofcourse, this does not automagically mean that the Mk I is correct over the Mk III, but if I were to venture a guess, I would still say that the Mk I is more accurate in-game than the Mk III, a very, very old SD model.