head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
An arcade test of jump timing and enemy-flipping precision on a single screen.

Execution · Pure Mechanics
A career-driven racing game blending story missions with circuit racing.
Mario Bros. leans Execution (Pure Mechanics); Pro Race Driver leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Bros.
Precise jumps and bump timing under crowding enemies decide survival
Pro Race Driver
precise cornering and braking control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Bros.
Versus mode adds light human interference, enemies are scripted
Pro Race Driver
AI racers don't truly adapt to player
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Bros.
Enemy spawns vary slightly but patterns are quickly learned
Pro Race Driver
some randomness in AI mistakes/weather
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Bros.
POW block usage and enemy routing have known best lines
Pro Race Driver
car setup and racing line knowledge
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.