Same kind of story whiplash and main conflict of becoming step siblings because of their parents remarriages. Similar type-casting for the characters as well particularly the male lead, female lead, second female lead, second male lead.

They both have the comedic rival gang feel to them. And a ridiculous main couple. I don't know exactly how to describe the similarities outside of the fact that these movies remind me of eachother. ¯\_(?)_/¯