Mmmh...It seems like they changed the personality of the MC and "witch", they were cold block of ices with one expression in the other manga.
Is possible that the publishers received rewievs that said how it was boring as there were 3 statues in the main cast (3rd is the supporter coming later) for the other port, and there was even the model student later that was similar, that artist wasn't bad but too many "cool" characters spoil the mood, is even possible that it was too much different from the novel or that it was axed just because the timing was bad and wasn't read from enough people.
The school director is really different now, she treated him with a lot more respect and fear in the other one, but this small changes will make this manga a new experience, if the general plot remains untocuhed it should be fine.