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
Reflex-driven point-to-point racing through heavily scripted setpieces.
Mario Bros. leans Execution (Pure Mechanics); Need for Speed: The Run 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
Need for Speed: The Run
Reaction driving through traffic and setpieces is the test
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
Need for Speed: The Run
Rivals rubber-band on scripts, nothing to out-think
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
Need for Speed: The Run
Scripted events surprise once, then are known
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
Need for Speed: The Run
Checkpoint routes and car choice are quickly solved
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.