I think the fact that the Wizard gets unique/exclusive spells that no one else has access to (yes they can use the scroll but then they are gone forever as opposed to scribing them in a spellbook) just denotes how special they are compared to Sorcerers.
Also is there any point playing a Custom Wizard when Gale's story so heavily plays into the fantasy of being a Wizard.
The problem being most if not all of those extra spells are trash.
I've not needed to purchase or cast any spells from scrolls while playing a Sorcerer and not using a Wizard except for story stuff on Gale.
Only 1 spell I've found myself wishing I had used was resilient spere - on just 2 or 3 NPCs that need saving and die a bit quick from mobs, though then I think either sanctuary or feign death would also work for that.
And actually looking at the spell description, I dont think the sphere blocks damage, just looks like hold spells without the auto crits meh/
