head to head
Batman: Arkham CityvsOverlord
Batman: Arkham City leans Execution (Practiced Mastery); Overlord leans Optimization (Practiced Mastery).
Batman: Arkham CityOverlord
Axis by axis
Execution5 vs 4
Batman: Arkham City leans harder on execution: Combo chains and counters need timing.
Reads1 vs 1
Even - both lean on reads about the same.
Variance1 vs 1
Even - both lean on variance about the same.
Optimization5 vs 6
Overlord leans harder on optimization: Minion type usage and upgrade economy reward planning
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

