The following compares the current state of Destruction Warlocks to Feral Druids using the latest SimulationCraft data for end-game PvE in World of Warcraft The War Within patch 11.0.2.
Comparison
Category
Winner
Feral Druid
+1.1%
When simulating boss fight encounters, Feral Druids averaged 1.1% more DPS than Destruction Warlocks (+15K DPS).
Feral Druid
+16.19%
When simulating AoE DPS, Feral Druids averaged 16.19% more DPS than Destruction Warlocks (+143K DPS).
Destruction Warlock
+23.43%
Destruction Warlocks have higher spike damage potential, achieving +1.6M more DPS than Feral Druids.
Spike damage is the peak DPS achieved in any given moment and is not sustained DPS.
Destruction Warlock
+0.73%
When upgrading the gear for both specs by +44 ilvl, Destruction Warlock DPS improved the most, +0.73% more than Feral Druid. In total, Destruction Warlocks DPS increased by 67.53% and Feral Druids by 66.8%.
Feral Druid
+2.57%
+ Movement and latency lowered the DPS by 5.43% for Feral Druids.
+ Movement and latency lowered the DPS by 8% for Destruction Warlocks.
When introducing occasional movement and real-world latency, Feral Druids performed better, as Destruction Warlocks suffered a +2.57% DPS loss.
Destruction Warlock
When evaluating abilities used during boss encounters, Destruction Warlocks had fewer damaging abilities in total, indicating a potentially less complex rotation.
The comparisons above highlight some of the key differences between Destruction Warlock and Feral Druid in the current meta, which can hopefully help you determine which spec to play or group up with.