The only thing that I'm missing from the studio version is Ayanna's "To be brave enough to listen..." that sort of responds to Peter's verses. I'm sure it'll be on the official live version, but I would have loved to hear on the studio version as well.
If you have access to the In-Side mixes, that "To be brave enough to listen" response bit can be heard at around 6:15! Curiously enough, both the Bright-Side and Dark-Side mixes omit this, so I was beyond happy when I listened to the In-Side mix and it was finally there, being one of those small yet larger-than-life moments for me.
Looking at the credits for the song, the singer in question might be Phumla Nkhumeleni (credited with "female ululating and chanting") or Phello Jiyane (credited as choir solo soprano).