I have the original tracklisting from the Universal website that states a few songs have been messed with. One specifically said new vocals. Hold on let me find it.
CD5 - B-sides and Bonus Tracks
01. Lady with the spinning head (UV1)
02. Blow Your House – Analogue Mix Bono Edit 190711
03. Salome
04. Even Better Than the Real Thing (Single)
05. Satelite of love
06. Wild Horses (Temple Bar Remix)
07. Heaven And Hell – In Truth Mix 210711
08. Oh Berlin – Analogue Mix 1 190711 (needs an edit)
09. Near the Island (instr) Night train from Rostock.
10. Down All The Days (Vsn 1) [CD#4/07] (needs edits)
11. Paint it black
12. Fortunate Son
13. Alex Descends into Hell for a bottle of Milk/Korova
14. Where did it all go wrong
15. Everybody loves a winner edit between take 2+3
16. Real Thing (Fish out of water mix)
So Blow Your House Down is definitely a new vocal, laid down on 19-07, aka when they were in New York. So that would work timewise. Oh Berlin is also from that date, though it doesn't state whether the vocals were changed or not. Same with Heaven and Hell.
Interesting though, I just realised Down All The Days. It has a CD number and track number. Did they use the same working tapes as the Salome sessions?