Just noticed that 'perspiration' is spelled wrong on the caption to the Townshend photo. It has this in common with the vinyl edition of twenty years later (see 3715609).
The main differences between the mono and stereo is the editing of tracks and there's not a great deal of the guitar tracks that differ, although Our Love Was does have a completely different guitar track. The Mono album version of Rael is much shorter than the Stereo.
1) Radio London 0’27 mono, 0’27 stereo
2) Armenia City In The Sky 3.11 mono, 3’12 stereo
3) Radio London 0’09 mono, 0’08 stereo
4) Heinz Baked Beans 0’54 mono, 0’57 stereo
5) More Music 0’03 mono, 0’03 stereo
6) Mary Anne With The Shaky Hand 2’03 mono, 2’04 stereo
7) Premier Drums 0’22 mono, 0’15 stereo
Radio London 0’08 mono, 0’09 stereo
8) Odorono 2’12 mono, 2’16 stereo
9) Radio London 0’16 mono, 0’18 stereo
10) Tattoo 2’38 mono, 2’42 stereo
11) Radio London (Church Of Your Choice) 0’08 mono, 0’09 stereo
12) Our Love Was 3’04 mono, 3’06 stereo & different guitar
13) Radio London (Pussycat)/Speakeasy/Rotosound strings 0’17 mono, 0’17 stereo
14) I Can See For Miles 3’59 mono, 4’18 stereo
15) Charles Atlas 0’26 mono, 0’26 stereo
16) I Can't Reach You 3’03 mono, 3’03 stereo
17) Medac 0’55 mono, 0’57 stereo
18) Relax 2’34 mono, 2’38 stereo
19) Rotosound Strings (demo) n/a mono, 0’03 stereo
20) Silas Stingy 2’56 mono, 3’03 stereo
21) Sunrise 2’58 mono, 3’03 stereo
22) Rael (1and 2) 5’23 mono, (1) 5’44 stereo & (2) 0’47 stereo
23) Track Records 0’20 mono, 0’18 stereo
tracks 14-23 also produced by kit lambert, respectively at talent masters studios ny, de lane lea studios london, advision studios london, (unspecified) ny, brass at bradley's barn, nashville, inc studios, london, cbs studios london, kingsway studios london, sound techniques studio london, talent masters studios ny, de lane lea studios london: all for his & chris stamp's track records, during 1967 (may through november, save a few tracks whose month of recording is not now certain) sessions for the lp.
n.b. the guitar tracks for the mono and stereo lps are different, as was quite commonly the case for the period before "stereo playable mono" and the phasing out of mono (where stereo recordings existed, or could be recovered from original master tapes) - and sometimes for all instruments, and even vocals.