Dmg
With 50% PvP-Power in full 496 Tyrannical we will do 1.5x of the PvE-Dmg to players. Let´s see what this means in numbers. I borrowed some tables from noxxic.com for this comparison. Please take this data with a grain of salt. PvP != PvE. With all this CC, Dmg based on ressource regen isn´t comparable. This is about sustained Dmg, not burst.
Normal Mode Raiding Gear (522), which is as easily achieveable as Tyrannical http://www.noxxic.com/wow/dps-rankings/realistic#522 - 140k dps for PvP if gemmed for PvE. Might be more if gemmed for PvP with the Tyrannical weapon.