I think there isn't a solid definition that applies to all instances on exactly what is to be considered a remastered work, and what is to be considered a remixed work.
A remastered work often "sounds" louder and therefor different, while the frequency components are basically still in tact.
I'm wondering whether acoustic id is able to identify the difference between an remastered version and a version that was mastered before the remasted version / or the plain mix. (leaving aside underwater bubbles added in the intro).
Perhaps it might be something interesting to test.