Yep, the first would be canon compliant/missing scene and the second could be an AU.

However, as jadelennox points out, an AU often takes elements of canon and puts them into a completely different setting (e.g. "Harry Potter is running in the county council elections with the help of his brilliant campaign manager Hermione Granger, but local gentleman farmer and man about town Draco Malfoy has been put forward to contest the seat for the Conservatives and is proving a wily rival" or "Molly Weasley runs a chaotic but popular cafe in Warren Street with the haphazard assistance of her twin sons, George and Fred. When a disheveled young homeless boy named Harry arrives on the scene, they decide to offer him a job").