Auriel's Shield's "unique" ability is pretty much a waste since you can use Unrelenting Force.
Spellbreaker's Ward effect increases in magnitude depending on your block skill. The Ward absorb perk from Restoration skill will help you a lot as well.
So, it's Spellbreaker all the way, unless you plan on creating your own shield with magic resistance and fortify block.
A legendary dragonscale/bone shield with 45% fortify block and 22% magic resistance is totally boss. I raise my shield and sprint into spellcasters while shrugging off the damage and then laughing as I knock them on their arse. I don't know if it works as well without the 30% magic resistance from alteration perks and 50% elemental resistance from the block perk though. Spellbreaker might be better in that case, but i've never liked the idea of being staggered and lowering my shield from the ward breaking.
I used to be an internet troll like you, but then I took an arrow in my immaturity.