Last I looked, the Ford S-Types were fairly well sorted out for their years between the various revisions so would say it's easy to sort them out between at least X200, X202 and X204. The 2002 and 2004 revisions pretty much changed something on each of the views we're most likely to have (front, side, back and interior).

Question is whether it is useful to go to that precise system rather than just stick to X200.