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
Frame-precise rhythm-platforming execution on fully deterministic tracks.

Execution · Pure Mechanics
Infamous climbing game where one slip of the hammer undoes hours of progress.
Bit.Trip Presents... Runner2: Future Legend of Rhythm Alien leans Execution (Pure Mechanics); Getting Over It with Bennett Foddy leans Execution (Pure Mechanics).
Getting Over It with Bennett Foddy leans a little harder on execution, though the gap is small.
Bit.Trip Presents... Runner2: Future Legend of Rhythm Alien
Frame-tight rhythm inputs on fixed tracks are everything
Getting Over It with Bennett Foddy
Every inch climbed is precise hammer micro-control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Bit.Trip Presents... Runner2: Future Legend of Rhythm Alien
No opponent; the track never adapts
Getting Over It with Bennett Foddy
The mountain never adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Bit.Trip Presents... Runner2: Future Legend of Rhythm Alien
Levels are fully deterministic
Getting Over It with Bennett Foddy
Fully deterministic physics and terrain
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Bit.Trip Presents... Runner2: Future Legend of Rhythm Alien
Memorising layouts helps but execution still gates clears
Getting Over It with Bennett Foddy
Route knowledge helps but cannot replace hands
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.
full breakdown
Bit.Trip Presents... Runner2: Future Legend of Rhythm Alien →
full breakdown
Getting Over It with Bennett Foddy →