Question about foot pedals Sewing Machines Parts and Sales in Los Angeles

I acquired a Singer Stylist (7258) but it has no foot pedal. Thanks to the on/off button we know it works, but we’d like a real foot pedal for safety and precision. I know the correct foot pedal for this machine is 4C-337GS, however 4C-337G and 4C-337B look identical and I could get them for less. They also look identical. Is there a real difference? Would they all work or would they perform differently?