For most of their albums (until the white album) there is no way that a stereo version sourced from the 4 tracks mono masters can be done correctly.
Simply because the master takes with individual intruments and or vocal doesn't exit anymore*, as multitrack fold down to one track were made to make space and add overdubs (such as double-track some vocal). The only available material are already mixed 4 tracks mono masters so the best they can do is clean things here and there, and get the best possible balance between these 4 tracks.
Additionaly, the standard at that time was mono recording. George Martin and the Beatles did supervise the mono mix but left the stereo work to be done by assistants. So the version to get is the mono one (although less appealing at first).
EMI know that the common buyer will not be interested by the mono version but the so called "collectors" are. And they found nothing else to do to make a real cash-in and provide the mono mixes only in a limited boxset edition and beside much more expensive with less album than its stereo counterpart release (uh!). So you can't buy the Revolver or SPLHB mono version alone, you are obliged to buy the whole mono catalogue - what a rip off !!!!
* : in early days, especially for pop music, once the recording was out the record company erased the masters tapes to re-use them for other recordings, also did the BBC.
