head to head
vs
Half-Life 2vsStreet Racer
Half-Life 2 leans Execution (Pure Mechanics); Street Racer leans Execution (Pure Mechanics).
Half-Life 2Street Racer
Axis by axis
Execution6 vs 6
Even - both lean on execution about the same.
Reads1 vs 2
Street Racer leans harder on reads: Shared-lane multiplayer adds light jockeying against humans
Variance1 vs 1
Even - both lean on variance about the same.
Optimization3 vs 2
Half-Life 2 leans harder on optimization: Linear progression with no builds.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.