The 'Lullaby (RS Home Instrumental Demo)' on 'Alternative Rarities 1988-1989' is 6 seconds shorter than the version posted on the old 'Greatest Hits' microsite, which has a longer intro. If you want it, I have it here, along with all of the other 'Hits' microsite bonus tracks. Also note that the 'Hits' version of 'Pictures of You (RS Home Demo)' is 4:42, while the 'Rarities' version is 3:31. Edit? Different demo?
(Thanks to Andreas for pointing this out)