Which Seal is better to use in PvP?

I was wondering why I often see Rets dueling other Rets utilizing the Seal of Corruption. Is this better than Retribution?

I primarily utilize Seal of Corruption in all my duels and anything PvP oriented, but now I'm getting second thoughts about how useful Seal of Corruption may be. Also, I'm not using the Seal of Corruption Libram, just the common Flash of Light Wrathful Libram and I am BiS geared.

Anyone have any insight?

Seal of Corruption can be decent damage if you can stick to the target and apply pressure with it constantly. Otherwise, it's not that great.

In Ret vs Ret fights Seal of Vengeance is best. Use 1h+shield to stack 5 on target and then switch to 2h weapon and go yolo.
On any other class (except healers) Seal of Righteousness beats SoV.