with the command line :
./raine -gl|grep Sailor
sailormo : Pretty Soldier Sailor Moon
sailormn : Pretty Soldier Sailor Moon Ver B
So the main appears as "ver b", the so-called clone is actually the 1st version and appears just as "pretty soldier sailor moon", and the file is sailormo, o like old.
You have the eye for detail, the region switch was broken probably a very long time ago and nobody noticed till now, which is not a big surprise since the only thing it changes is the copyright screen and nothing else... ! From what I vaguely remember the region is in the eeprom, clearly it was lost somewhere here. I don't guarantee I'll fix it.
And of course the company which produces it doesn't communicate about any changes made, so you can't know if there are really differences between the version b and the original, usually the changes are very minor though.
And no, clones and regions are totally different, although there are a lot of clones which change only the region (for some games the region can be changed by changing just 1 byte, and it's the case with this one).