I disagree, simply because Ford have the ST versions as separate cars on their website on the drop down list ( like BMW have the M cars separately).
It obviously doesn't matter, but as wingman said above, if ST is just a trim level then so are the M3's, Audi RS, VW GTI/R cars etc.
To use your examples:
Yes an M3 is a trim of 3-series. An E90 M3, is an E90 3-Series.
Yes an RS3 is a trim of an A3 of that same model code.
Yes a Golf GTI/R is a trim of a Golf of that same model code.
And...Yes a Focus ST, or a Focus RS, is a trim of a Focus Mk1, Mk2, etc etc.
My _god_ this is simple
