The following compares the current state of Assassination Rogues to Frost Mages using the latest SimulationCraft data for end-game PvE in World of Warcraft The War Within patch 11.0.2.
Comparison
Category
Winner
Frost Mage
+7.77%
When simulating boss fight encounters, Frost Mages averaged 7.77% more DPS than Assassination Rogues (+118K DPS).
Frost Mage
+7.56%
When simulating AoE DPS, Frost Mages averaged 7.56% more DPS than Assassination Rogues (+77K DPS).
Assassination Rogue
+67.87%
Assassination Rogues have higher spike damage potential, achieving +5.9M more DPS than Frost Mages.
Spike damage is the peak DPS achieved in any given moment and is not sustained DPS.
Assassination Rogue
+0.62%
When upgrading the gear for both specs by +44 ilvl, Assassination Rogue DPS improved the most, +0.62% more than Frost Mage. In total, Assassination Rogues DPS increased by 68.03% and Frost Mages by 67.41%.
Frost Mage
+0.84%
+ Movement and latency lowered the DPS by 14.44% for Frost Mages.
+ Movement and latency lowered the DPS by 15.28% for Assassination Rogues.
When introducing occasional movement and real-world latency, Frost Mages performed better, as Assassination Rogues suffered a +0.84% DPS loss.
Frost Mage
When evaluating abilities used during boss encounters, Frost Mages had fewer damaging abilities in total, indicating a potentially less complex rotation.
The comparisons above highlight some of the key differences between Assassination Rogue and Frost Mage in the current meta, which can hopefully help you determine which spec to play or group up with.