@samuela I think you got the lists wrong. The differences are actually:
Middle School bans:
Lion’s Eye Diamond
Force of Will
Show and Tell
Tendrils of Agony
They both attack fast mana in a way (Mana Crypt is illegal in both), but I fell premodern is much more interested in slowing combo decks, while Middle School is more interesting in making FoW check combo. I for one prefer the Premodern approach. Letting stuff like Entomb, Frantic Search, Necro, Mystical, etc, feels to me like the format makes a lot of archetypes obsolete. Haven't played it yet, but that's the overall feeling. Premodern seems more fair and willing to make a different gameplay than we're used to.
I mean, am I really going to play an old school format to play the same combo x FoW games I play in Legacy/Vintage? I want a different game feel than what I'm used to. That's what old school formats are all about. I hate the name "Premodern", but I feel it's a format I'm more willing to invest.