[strat61caster]

Eh, BS is full of cars that are ~300 hp and up (Cayman S, M2, C5 etc.), put everyone on a big runway course where they can stretch their legs and CS doesn't stand a chance, NC/ND, 86, RX-8, S2000, Boxster etc. CS is mostly <250hp cars that are a few hundred to a thousand lbs lighter than BS, tighten up the course and boom they're neck and neck.

Classes exist for like competition to minimize the impacts of course dependancy, PAX is a tack on to try and index the competition based on a 'local-style' course design (erring on the side of smaller and more technical not big runways with cars hitting 70+ mph). You'd see different numbers if you could select base on course type. Each class seems to have a decent philosophy behind it allowing 2-5 contenders and a few dark horses that can win on the right day, it's easy to take for granted what is already in place.