172 cup got lower, firmer suspension, wider track, larger rear spoiler, lip splitter and turinis. more raw, track prepped version of the standard 172
you couldnt spec a 172 with the cup parts
182 cup got lower suspension, grey wheels, larger rear spoiler and lip splitter. pov spec version of the standard/ff 182 tbh
you could spec a 182 with the cup spoiler/splitter and suspension making it a full fat 182. so picking a 182 cup over a ff is silly... in CS's opinion
172s and 182s are essentially the same car though