head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Pure Mechanics
A pure reaction-timing endurance test against accelerating random obstacles.

Execution · Pure Mechanics
A classic beat-em-up demanding execution against scripted enemy waves.
Chrome Dino leans Execution (Pure Mechanics); Teenage Mutant Ninja Turtles III: The Manhattan Project 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.
Chrome Dino
Jump and duck timing at accelerating speed is everything
Teenage Mutant Ninja Turtles III: The Manhattan Project
beat-em-up timing and enemy juggling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Chrome Dino
No opponent, just obstacles
Teenage Mutant Ninja Turtles III: The Manhattan Project
enemies run simple fixed scripts
Chrome Dino leans a little harder on variance, though the gap is small.
Chrome Dino
Obstacle order is random but instantly readable
Teenage Mutant Ninja Turtles III: The Manhattan Project
minor enemy spawn randomness
Teenage Mutant Ninja Turtles III: The Manhattan Project leans a little harder on optimization, though the gap is small.
Chrome Dino
Almost nothing to plan beyond reaction discipline
Teenage Mutant Ninja Turtles III: The Manhattan Project
character choice and route memorization
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.