IIRC, the two AP courses I took which were nothing like their equivalent freshman courses, were physics and calculus.
Freshman university physics for engineering majors was an absolutely brutal course. Freshman calculus wasn't quite as brutal, but not easy at all either. (Freshman physics was frequently used as a "weedout" course at many universities, largely to kick out as many freshman engineering majors as possible).
In contrast, AP physics and AP calculus were like "child's play".