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
Infamous climbing game where one slip of the hammer undoes hours of progress.

Execution · Pure Mechanics
Finger speed and accuracy against fixed note charts of 80s tracks.
Getting Over It with Bennett Foddy leans Execution (Pure Mechanics); Guitar Hero Encore: Rocks the 80s 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.
Getting Over It with Bennett Foddy
Every inch climbed is precise hammer micro-control
Guitar Hero Encore: Rocks the 80s
Hitting note charts at speed is a pure motor ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Getting Over It with Bennett Foddy
The mountain never adapts
Guitar Hero Encore: Rocks the 80s
No opponent, just the chart
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Getting Over It with Bennett Foddy
Fully deterministic physics and terrain
Guitar Hero Encore: Rocks the 80s
Charts are fixed and fully memorisable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Getting Over It with Bennett Foddy
Route knowledge helps but cannot replace hands
Guitar Hero Encore: Rocks the 80s
Star power pathing squeezes out extra score
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.