head to head
Armored Core 4vsGears of War 4
Armored Core 4 leans Optimization (Practiced Mastery); Gears of War 4 leans Execution (Practiced Mastery).
Armored Core 4Gears of War 4
Axis by axis
Execution7 vs 7
Even - both lean on execution about the same.
Reads3 vs 4
Gears of War 4 leans harder on reads: predicting human opponents in PvP
Variance1 vs 2
Gears of War 4 leans harder on variance: weapon spawns and drops vary
Optimization8 vs 6
Armored Core 4 leans harder on optimization: Garage tuning and part synergy decide fights before they start
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.

