Aura in Spellbook

If I have the same base Aura ability in spellbooks multiple times on a unit, but with different buffs, will they stack?

The buffs will supposedly all show, but I don't think the aura effects will stack.

Just realized how easy it would be to test, and did so. Both Buff icons show, and they stack =D. Perfect.

The effects stack? What aura did you use?

Devotion Aura with +1.5 armor. The unit had +3 armor.