OK so we don't say condo at all where I'm from so I had to look it up - but it seems like condominium is a type of ownership, and you would still buy an "apartment" that's in a "condo"?
Source is unfortunately a reddit thread: https://www.reddit.com/r/AskACanadian/comments/1b3wlso/why_do_north_americans_distinguish_between_an/
Which "Say Cheese and Die" is this?