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 Pac-Man-style routing and dodging test wearing an Alien license.

Execution · Practiced Mastery
The infamous, glitch-ridden 2006 Sonic reboot where the physics are the real boss.
Alien leans Execution (Practiced Mastery); Sonic the Hedgehog (2006) 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.
Alien
Maze dodging under drone pursuit is pure timing
Sonic the Hedgehog (2006)
Fighting unreliable physics demands constant correction
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Alien
Drones chase with simple fixed logic, nothing adaptive
Sonic the Hedgehog (2006)
No adaptive opposition
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Alien
Drone movements vary slightly per attempt
Sonic the Hedgehog (2006)
Bugs make outcomes partly unpredictable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Alien
Optimal egg-clearing routes are quickly mappable, Pac-Man style
Sonic the Hedgehog (2006)
Learning which routes the jank permits
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.