It won’t be live as such as it will just be the original studio recording with some live musicians, but as with all of them, it will sound different. For this one, it’s just nice to have a visual performance rather than the cut-and-paste job of the video (which was put together by ABBA’s UK record company CBS-Epic at the time). I have heard that that it loses a verse. Not sure which one. As it has three, it will still be OK without one but I wish they hadn’t. And apparently When All Is Said and Done gains a verse (though just a refrain of the first one - the track already existed in this expanded form).