The following compares the current state of Subtlety Rogues to Unholy Death Knights using the latest SimulationCraft data for end-game PvE in World of Warcraft The War Within patch 11.0.2.
Comparison
Category
Winner
Unholy Death Knight
+5.21%
When simulating boss fight encounters, Unholy Death Knights averaged 5.21% more DPS than Subtlety Rogues (+80K DPS).
Subtlety Rogue
+8.44%
When simulating AoE DPS, Subtlety Rogues averaged 8.44% more DPS than Unholy Death Knights (+87K DPS).
Subtlety Rogue
+24.67%
Subtlety Rogues have higher spike damage potential, achieving +1.9M more DPS than Unholy Death Knights.
Spike damage is the peak DPS achieved in any given moment and is not sustained DPS.
Subtlety Rogue
+5.48%
When upgrading the gear for both specs by +44 ilvl, Subtlety Rogue DPS improved the most, +5.48% more than Unholy Death Knight. In total, Subtlety Rogues DPS increased by 70.45% and Unholy Death Knights by 64.97%.
Unholy Death Knight
+16.59%
+ Movement and latency lowered the DPS by 6.15% for Unholy Death Knights.
+ Movement and latency lowered the DPS by 22.73% for Subtlety Rogues.
When introducing occasional movement and real-world latency, Unholy Death Knights performed better, as Subtlety Rogues suffered a +16.59% DPS loss.
Subtlety Rogue
When evaluating abilities used during boss encounters, Subtlety Rogues had fewer damaging abilities in total, indicating a potentially less complex rotation.
The comparisons above highlight some of the key differences between Subtlety Rogue and Unholy Death Knight in the current meta, which can hopefully help you determine which spec to play or group up with.