This page is maintained to show how Destruction Warlocks and Frost Death Knights compare in PvE end-game at level 80 — and was last updated for patch 12.0.1 of the Midnight Pre-Patch expansion.
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Note: Rankings are temporarily frozen during the Midnight pre-patch while SimulationCraft development focuses on Midnight end-game tuning at level 90.
Comparing DPS (Destruction Warlock vs. Frost Death Knight)
Anytime the game updates, we run simulations using BiS profiles and SimulationCraft to analyze the current meta of all specs in WoW. Below shows which spec had the highest DPS for each category. To view more information in a category, click the Details button.
Performance ComparisonPatch 12.0.1
Frost Death Knight+0.01% DPS
When simulating for maximum theoretical single-target DPS, Frost Death Knights averaged 0.01% more DPS than Destruction Warlocks (+743 DPS).
Frost Death Knight+19.86% DPS
When simulating for light AoE DPS potential, with small waves of adds, Frost Death Knights averaged 19.86% more DPS than Destruction Warlocks (+2M DPS).
Destruction Warlock+0.61% DPS
When upgrading the gear for both specs by +39 ilvl, Destruction Warlock DPS improved the most, +0.61% more than Frost Death Knight. In total, Destruction Warlocks DPS increased by 66.12% and Frost Death Knights by 65.51%.
Destruction Warlock+4.93% DPS
When simulating for max single-target DPS with the new Single-Button Assistant, Destruction Warlocks averaged 4.93% more DPS than Frost Death Knights (+252K DPS).
This category evaluates the burst DPS potential of each spec by simulating a short encounter with full raid buffs and bloodlust.
This category evaluates the solo DPS potential of each spec by simulating a typical solo delve encounter with no raid buffs.
This category evaluates the pure AoE DPS potential of each spec by simulating both specs to fight intense groups of adds, with nearly 16 adds at any given moment.
This category evaluates the performance of each spec when introducing occasional movement and stuns during boss encounters.
This category evaluates the latency tolerance of each spec by simulating both specs with moderate-to-high latency. This can indicate which spec performs better when facing high latency, whether due to far server/realm location or limited access to quality internet.
This category evaluates the skill level required to play each spec by simulating both specs with greatly reduced player skill. This can indicate which spec is more forgiving of mistakes or has a simpler rotation.
The comparisons above highlight some of the key differences between Destruction Warlock and Frost Death Knight in the current meta, which can hopefully help you determine which spec to play or group up with.
Destruction Warlockvs Frost Death Knight
Frost Death Knight+0.01% DPS 
Destruction Warlock+0.61% DPS