I'm always on the fence with this. I love the Bad album version but I always find myself coming back to the Captain Eo version. You're right it's so funky and raw, the bass really slaps, plus it feels more front and centre in the mix.
As much as I love the album versions of tracks, I do go back the demos for their funky rawness, it's something that came naturally to Mike and I sometimes feel he polished it almost too much out of his catalogue. That's why I'm so glad these different versions exist so we can have the best of both worlds.
Another Part Of Me, is one of my favourite songs, that bass and them vocals are just everything. It's like Startin' Somethin' for me though, I find myself listening the live version more than anything else because it just feels so funky and energetic.