The following compares the current state of Demonology Warlocks to Enhancement Shamans using the latest SimulationCraft data for end-game PvE in World of Warcraft The War Within patch 11.0.2.
Comparison
Category
Winner
Enhancement Shaman
+21.94%
When simulating boss fight encounters, Enhancement Shamans averaged 21.94% more DPS than Demonology Warlocks (+377K DPS).
Enhancement Shaman
+23.45%
When simulating AoE DPS, Enhancement Shamans averaged 23.45% more DPS than Demonology Warlocks (+228K DPS).
Enhancement Shaman
+10.93%
Enhancement Shamans have higher spike damage potential, achieving +363.3K more DPS than Demonology Warlocks.
Spike damage is the peak DPS achieved in any given moment and is not sustained DPS.
Demonology Warlock
+2.57%
When upgrading the gear for both specs by +44 ilvl, Demonology Warlock DPS improved the most, +2.57% more than Enhancement Shaman. In total, Demonology Warlocks DPS increased by 67.63% and Enhancement Shamans by 65.06%.
Enhancement Shaman
+5.33%
+ Movement and latency lowered the DPS by 13.44% for Enhancement Shamans.
+ Movement and latency lowered the DPS by 18.77% for Demonology Warlocks.
When introducing occasional movement and real-world latency, Enhancement Shamans performed better, as Demonology Warlocks suffered a +5.33% DPS loss.
Demonology Warlock
When evaluating abilities used during boss encounters, Demonology Warlocks had fewer damaging abilities in total, indicating a potentially less complex rotation.
The comparisons above highlight some of the key differences between Demonology Warlock and Enhancement Shaman in the current meta, which can hopefully help you determine which spec to play or group up with.