Grandmas Boy vs Superbad

Hey whats up guys? Danny Again! In the past two years I have seen two very similar movies in Superbad and Grandmas Boy. Both movies featured a lot of immaturity and a high school sense of humor. They showed smoking, drinking, and partying with a crude sense of humor that appealed to me. With such similar structures of cheap comedies, I don't get how film critics rated Superbad so highly (as the comedy of the year) and Grandmas Boy so poorly. As Scott Weinberg of efilmcritic said about Grandmas Boy,

I won't even bore you with the horrendous way this project was shot, cut, or
scrawled with crayon onto a roll of toilet paper.

Furthermore, the critics tomatometer on rottentomatoes.com rated Grandmas Boy a 16% and Superbad 87%. To me, all this is is a band wagon effect of a few critics degrading Grandmas Boy and everyone jumping on, and vice versa for Superbad. Allen Covert and Nick Swardson are hilarious throughout Grandmas Boy. I am interested in seeing if any other people that have seen both Grandmas Boy and Superbad agree with more, or if the critics prevail again.