head to head
vs
Mario Kart: Double Dash!!vsSplit/Second
Mario Kart: Double Dash!! leans Execution (Twitch Chaos); Split/Second leans Execution (Pure Mechanics).
Mario Kart: Double Dash!!Split/Second
Axis by axis
Execution7 vs 8
Split/Second leans harder on execution: Drafting, drifting and dodging collapsing set pieces.
Reads3 vs 2
Mario Kart: Double Dash!! leans harder on reads: Item duels against humans reward baiting
Variance5 vs 4
Mario Kart: Double Dash!! leans harder on variance: Special item rolls swing races
Optimization4 vs 4
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.