They belong to a class of drugs called incretin mimetics, but have different active ingredients and mechanisms of action.
While not its primary approved use, it often leads to significant weight loss and is sometimes prescribed off-label for this purpose
Both share similar common side effects, primarily gastrointestinal issues like nausea, vomiting, diarrhea, and constipation.
Both medications carry a boxed warning (the FDA's most serious warning) for the potential risk of thyroid C-cell tumors, based on animal studies.