What is the benefit of thassilonian specialist over just a regular specialist wizard?

[Tacred]

I see that they get 2 extra slots and the spell in those slots have to be the same, but dont specialist mages already get additional spell slots along with special buffs and abilities for their school that thassilonians don't get? What is the benefit?

[Mork]

+1 spell vs normal specialist
They still get special buffs an abilities from their school but they lose total access to opposites schools.

[deuxhero]

In addition normal specialists only get one bonus slot.

Thassilonian Specialist is an fine archetype if you know what you're doing but it primarily exists for fluff. In D&D 3E, all specialist wizards had schools that they outright couldn't learn from. Early Pathfinder (the third party adventures/setting for D&D 3.5) featured the ancient Thassilonian empire which had a whole culture based around their prohibited schools and their rulers, the Runelords, went to great lengths to work around their prohibited schools. When Pathfinder (the system) came around opposition schools for wizards were main merely painful, not impossible, to use. This is nice for the players to have, but broke all the stuff about Runelords. TS was created to fix that by having Thassilonian magic work a bit differently. (It's in this video game because, even though it technically isn't an archetype, they wanted three archetypes for every class and most of the WIzard ones are garbage and/or impossible to implement in a video game)

[Tacred]

Originally posted by Mork:

+1 spell vs normal specialist
They still get special buffs an abilities from their school but they lose total access to opposites schools.

Oh, for some reason they dont show that in character creation until you get to the very end of it.

[BlueBangkok]

Considering that you can get 34+ intelligence by the endgame which gives you tons of extra spell slots, this archetype is indeed mostly for fluff. If it had stacking bonuses like it has in DnD3.5, that would be something. But a regular specialist is more than enough in PK, imho.