[mickmate]

The English ones (Brasscraft) are better quality with the fit of the side posts where they wrap around the top corners. The threaded holes are on an angle with the cheaper ones which requires a little trick to get the windwings hardware to work. They are pretty much standard except the SPF has a different screen/glass. As mentioned with the wide rubber and curve along the bottom they can accomodate about any body and windscreen angle.