Bands sometimes take new songs out on the road before they release an album. Radiohead, for example, toured songs from In Rainbows before releasing it.
I’d imagine the Cure have used their lives dates as an opportunity to re record parts or otherwise tinker.
TBH I found the new Cure songs decent enough if rather ponderous and samey. All that moaning about the end of the world gets a bit tiresome, too. I hope they inject more dynamics into the recorded versions.