head to head
vs
Half-Life: AlyxvsHelix Jump
Half-Life: Alyx leans Execution (Pure Mechanics); Helix Jump leans Execution (Pure Mechanics).
Half-Life: AlyxHelix Jump
Axis by axis
Execution7 vs 7
Even - both lean on execution about the same.
Reads1 vs 0
Half-Life: Alyx leans harder on reads: Combine and headcrabs scripted.
Variance2 vs 2
Even - both lean on variance about the same.
Optimization3 vs 2
Half-Life: Alyx leans harder on optimization: Few systems to tune.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.