head to head
vs
Half-Life: AlyxvsRescue Mission
Half-Life: Alyx leans Execution (Pure Mechanics); Rescue Mission leans Execution (Pure Mechanics).
Half-Life: AlyxRescue Mission
Axis by axis
Execution7 vs 8
Rescue Mission leans harder on execution: Light-gun aiming accuracy is the entire game
Reads1 vs 1
Even - both lean on reads about the same.
Variance2 vs 3
Rescue Mission leans harder on variance: Enemy appearance timing adds some unpredictability
Optimization3 vs 3
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.