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

Execution · Practiced Mastery
A stealth-action adventure testing cover shooting and memorised patrol routes.

Execution · Practiced Mastery
Modern 2D Mario platformer built on classic jump precision and hidden exits.
Headhunter leans Execution (Practiced Mastery); New Super Mario Bros. leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Headhunter
Cover shooting and bike license tests demand steady hands
New Super Mario Bros.
Jump timing and momentum control carry every level
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Headhunter
Enemy guards run fixed patrol scripts
New Super Mario Bros.
Enemies follow fixed scripted patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Headhunter
Level layouts hold few surprises after one pass
New Super Mario Bros.
Levels fully deterministic once seen
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Headhunter
Learning patrols, routes and LEILA trials carries progress
New Super Mario Bros.
Secret exits, star coins, and route 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.