The following compares the current state of Outlaw Rogues to Shadow Priests using the latest SimulationCraft data for end-game PvE in World of Warcraft The War Within patch 11.0.2.
Comparison
Category
Winner
Outlaw Rogue
+10.59%
When simulating boss fight encounters, Outlaw Rogues averaged 10.59% more DPS than Shadow Priests (+166K DPS).
Outlaw Rogue
+26.98%
When simulating AoE DPS, Outlaw Rogues averaged 26.98% more DPS than Shadow Priests (+319K DPS).
Outlaw Rogue
+56.23%
Outlaw Rogues have higher spike damage potential, achieving +6.3M more DPS than Shadow Priests.
Spike damage is the peak DPS achieved in any given moment and is not sustained DPS.
Outlaw Rogue
+2.17%
When upgrading the gear for both specs by +44 ilvl, Outlaw Rogue DPS improved the most, +2.17% more than Shadow Priest. In total, Outlaw Rogues DPS increased by 69.04% and Shadow Priests by 66.87%.
Shadow Priest
+9.95%
+ Movement and latency lowered the DPS by 8.19% for Shadow Priests.
+ Movement and latency lowered the DPS by 18.14% for Outlaw Rogues.
When introducing occasional movement and real-world latency, Shadow Priests performed better, as Outlaw Rogues suffered a +9.95% DPS loss.
Outlaw Rogue
When evaluating abilities used during boss encounters, Outlaw Rogues had fewer damaging abilities in total, indicating a potentially less complex rotation.
The comparisons above highlight some of the key differences between Outlaw Rogue and Shadow Priest in the current meta, which can hopefully help you determine which spec to play or group up with.