The following compares the current state of Unholy Death Knights to Windwalker Monks using the latest SimulationCraft data for end-game PvE in World of Warcraft The War Within patch 11.0.2.
Comparison
Category
Winner
Windwalker Monk
+3.05%
When simulating boss fight encounters, Windwalker Monks averaged 3.05% more DPS than Unholy Death Knights (+49K DPS).
Windwalker Monk
+4.39%
When simulating AoE DPS, Windwalker Monks averaged 4.39% more DPS than Unholy Death Knights (+43K DPS).
Windwalker Monk
+32.18%
Windwalker Monks have higher spike damage potential, achieving +2.8M more DPS than Unholy Death Knights.
Spike damage is the peak DPS achieved in any given moment and is not sustained DPS.
Windwalker Monk
+3.34%
When upgrading the gear for both specs by +44 ilvl, Windwalker Monk DPS improved the most, +3.34% more than Unholy Death Knight. In total, Windwalker Monks DPS increased by 68.31% and Unholy Death Knights by 64.97%.
Windwalker Monk
+2.69%
+ Movement and latency lowered the DPS by 6.15% for Windwalker Monks.
+ Movement and latency lowered the DPS by 8.84% for Unholy Death Knights.
When introducing occasional movement and real-world latency, Windwalker Monks performed better, as Unholy Death Knights suffered a +2.69% DPS loss.
Unholy Death Knight
When evaluating abilities used during boss encounters, Unholy Death Knights had fewer damaging abilities in total, indicating a potentially less complex rotation.
The comparisons above highlight some of the key differences between Unholy Death Knight and Windwalker Monk in the current meta, which can hopefully help you determine which spec to play or group up with.