head to head
Doom II: Hell on EarthvsSky Force Reloaded
Doom II: Hell on Earth leans Execution (Pure Mechanics); Sky Force Reloaded leans Execution (Practiced Mastery).
Doom II: Hell on EarthSky Force Reloaded
Axis by axis
Execution8 vs 7
Doom II: Hell on Earth leans harder on execution: Super Shotgun and movement timing demand precise motor execution
Reads0 vs 0
Even - both lean on reads about the same.
Variance3 vs 3
Even - both lean on variance about the same.
Optimization5 vs 6
Sky Force Reloaded leans harder on optimization: Upgrade investment, medal grinding paths, and star usage are optimisable
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

