hhmm, isn't the Tanks job to mitigate damage? If so, the higher AC, the better the mitigation.
If you're talking about DPS, yes, the Ogre will do slightly better due to not getting stunned.
But when you're talking about all/warrior armor at the end game, Iksar are always gonna mitigate a little better due to the extra 65 or so AC they'll have (in the same gear).
Venerable Scalewulf Razortooth
Feral Lord of Karana