I've owned a PH2 172 and i currently own a 182 with cup packs . It's basically the same car , cosmetic differences on the 182 are the twin exhausts , alloys , usually anthracite as most have cup packs ,larger rear spoiler ,front splitter and silver seat belts .
Performance , no difference .
Handling , the 182 handles better imo . Slightly wider track , slightly lower and stiffer suspension and wider better gripping tyres ( Michelin Exaltos ) .
Both are good cars , but if i had to choose it would be the 182 with both cup packs .