I saw them both in the same sitting, both for the first time (at the same premiere as Frodo), and I was almost embarrassed to be associated with The Massive compared to That's it That's all. The crowd was STOKED on That's it That's all, not so much on the Massive.
If you're a total reggae fan, The Massive would be great though. Every song is reggae.
That being said, The Massive was still a dope movie, but it couldn't touch TITA or Believe either.