It is Craig's without question.

The Boys and Craig's Gang aren't really rivals,is more of a friendly rivarly,since all of them are friends,except for Cartman ,both The Boys and Craig's Gang hate Cartman!

I'd like terrance's crew more if their personalities came anywhere close to matching the intensity levels of their eyebrows

Craig and Those Guys are a more interesting group of characters, but Terrance's Group made for better rivals. The fact a lot of the fandom denies such a rivalry with Craig's group even exists is testament to the fact they suck as rivals.

Terrance's doesn't get screen time lmaooooo