WoWDB

Affliction:

You instantly deal [ 534 + 50% of Spell Power ] damage, and remove your Shadow damage-over-time effects from the target.

For 20 sec afterwards, the next target you cast Soul Swap: Exhale on will be afflicted by the Shadow damage-over-time effects and suffer [ 534 + 50% of Spell Power ] damage.

You cannot Soul Swap to the same target.

Soulburn:
Applies Corruption, Unstable Affliction and Agony without removing them from a target.

Demonology, Destruction:

You instantly deal [ 534 + 50% of Spell Power ] damage, and remove your Shadow damage-over-time effects from the target.

For 20 sec afterwards, the next target you cast Soul Swap: Exhale on will be afflicted by the Shadow damage-over-time effects and suffer [ 534 + 50% of Spell Power ] damage.

You cannot Soul Swap to the same target.