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
A deterministic precision platformer about executing pixel-perfect dash routes.

Execution · Pure Mechanics
Physics-balance execution refined over thousands of attempts on fixed tracks.
Celeste leans Execution (Pure Mechanics); Trials HD leans Execution (Pure Mechanics).
Celeste leans a little harder on execution, though the gap is small.
Celeste
Pixel-perfect dashes and wavedashes are the entire skill.
Trials HD
Throttle balance and weight shifts demand frame-tight physical control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Celeste
No opponent; level hazards are fully scripted.
Trials HD
Solo against static obstacle courses
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Celeste
Zero randomness; every screen is deterministic.
Trials HD
Tracks are identical every single attempt
Trials HD leans a little harder on optimization, though the gap is small.
Celeste
Route choice and tech selection are learnable but light.
Trials HD
Finding the optimal line through each obstacle rewards study
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.