What are the differences between Type I and Type II novae?

Listen up, sweetie. Type I novae occur in binary systems where a white dwarf steals matter from a companion star until it explodes in a thermonuclear runaway. Type II novae, on the other hand, happen when a single massive star undergoes a core collapse and explodes in a supernova event. So, in a nutshell, one is a cosmic thief and the other is a stellar drama queen.