OK, I'll bite.
TBL is anti-lecture. You get material ahead of time and study it independently.
then, with your team, you work on whatever assessment the faculty have for you. The current definition of this is you take an exam or quiz by yourself, and then collectively with your tema.
By teaching each other to get to the correct answer, your retention of the material is better. There's data for this and that's why this is the hot new thing in medical education. U VM has done away completely with lectures, and Wright State is very close to doing so as well.
Didactic lecture is like what you have in UG. The "sage on the stage" treats you as a vessel to fill up with info. This is typical passive learning,a nd there are better ways to do it.
PBL is more nuanced. And more labor intensive for faculty.
check out:
Problem-based learning in medical school: A student's perspective