Here are the specifics to some of the changes I've recognized so far.
-Tenka is introduced before Iroha and Hanzo. Sanae's first appearance is also the same as his.
-Instead of a drugged polar bear, Momoko had to fight the gym teacher who got drugged.
-Iroha and Hanzo never fight any Yakuza guys except in a flashback.
-No one saves Koushi from the man-eating snakes. She's shown to have injuries from them in the next chapter.
-The Uma Kamen costume doesn't have the torso piece at all.
-Uma Kamen's first full appearance is in the fight with Hikaru. Aside from fighting the thugs that beat up Koushi, none of the earlier scenes happened.
-No Kame Kamen
-No "ghost" girl
-The stuff at the apartment complex didn't happen
-No lesbian cosplay girl. The tiger family just sort of shows up (I think.)
-There's a tennis match where they go up against Ten Ten and the guy with braces who looks like Justice. The guy with braces plays in drag.
-When they go up against the Tiger family, there's a perverted, little, old man that tags along with them.