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

Execution · Pure Mechanics
Infamous climbing game where one slip of the hammer undoes hours of progress.

Execution · Pure Mechanics
Series peak whose hardest charts became a benchmark for human finger speed.
Getting Over It with Bennett Foddy leans Execution (Pure Mechanics); Guitar Hero III: Legends of Rock leans Execution (Pure Mechanics).
Guitar Hero III: Legends of Rock leans a little harder on execution, though the gap is small.
Getting Over It with Bennett Foddy
Every inch climbed is precise hammer micro-control
Guitar Hero III: Legends of Rock
Through the Fire and Flames defines a hands 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 III: Legends of Rock
Charts are fixed; boss battles are gimmicks
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 III: Legends of Rock
Deterministic note charts
Getting Over It with Bennett Foddy leans a little harder on optimization, though the gap is small.
Getting Over It with Bennett Foddy
Route knowledge helps but cannot replace hands
Guitar Hero III: Legends of Rock
Squeeze paths and star power optimization for scores
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.