The following compares the current state of Frost Death Knights 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
Frost Death Knight
+1.87%
When simulating boss fight encounters, Frost Death Knights averaged +28,024.19 more DPS than Unholy Death Knights, a 1.87% increase.
Frost Death Knight
+36.33%
When simulating AoE DPS, Frost Death Knights averaged +1,903,810.03 more DPS than Unholy Death Knights, a 36.33% increase.
Frost Death Knight
+3.13%
Frost Death Knights have higher burst damage potential, achieving +172.4K more DPS than Unholy Death Knights.
Note: this is the highest temporary DPS achieved in any given moment and is not sustained DPS.
Unholy Death Knight
+0.16%
+44 ilvl improved the DPS of Unholy Death Knight by 65.34%.
+44 ilvl improved the DPS of Frost Death Knight by 65.18%.
When comparing how both specs scale with gear, Unholy Death Knights had a higher DPS increase, a +0.16% higher increase than Frost Death Knights.
Unholy Death Knight
+7.3%
+ Movement and latency lowered the DPS of Unholy Death Knight by 6.29%.
+ Movement and latency lowered the DPS of Frost Death Knight by 13.59%.
When introducing occasional movement and real-world latency, Unholy Death Knights were less affected with a 6.29% decrease in DPS, whereas Frost Death Knights suffered a higher loss of 13.59% DPS.
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 Frost Death Knight and Unholy Death Knight in the current meta, which can hopefully help you determine which spec to play or group up with.