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
Retro Studios' notoriously tough revival of Donkey Kong Country with relentless set-piece levels.

Execution · Pure Mechanics
Physics-balance execution refined over thousands of attempts on fixed tracks.
Donkey Kong Country Returns leans Execution (Pure Mechanics); Trials HD leans Execution (Pure Mechanics).
Trials HD leans a little harder on execution, though the gap is small.
Donkey Kong Country Returns
Demanding rocket-barrel and mine-cart sections, strict timing
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.
Donkey Kong Country Returns
Scripted hazards, no adaptation
Trials HD
Solo against static obstacle courses
Donkey Kong Country Returns leans a little harder on variance, though the gap is small.
Donkey Kong Country Returns
Hidden puzzle pieces, fixed once found
Trials HD
Tracks are identical every single attempt
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong Country Returns
KONG letters and time attack routes are learnable
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.