Well, some say mono albums, some say stereo, and some have both...
The only way to determine what you like better is to listen both versions of the album/songs.
You don't have to be an audio expert - just follow your taste.
Comparing the track 'Flying' - I'd say it sounds better in mono (it has more depth).
'Your Mother Should Know' - it sounds better in stereo because in mono, it is a bit 'artificial' sounding - and you don't have switching the vocals L/R like in stereo.