head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
The N64 collectathon that buries five playable Kongs in collectibles.

Optimization · Practiced Mastery
The bigger, darker sequel where Abe possesses guards and saves hundreds of Mudokons with quicksaves.
Donkey Kong 64 leans Optimization (Practiced Mastery); Oddworld: Abe's Exoddus leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong 64
Moderate platforming and minigame dexterity
Oddworld: Abe's Exoddus
Trial-heavy platforming demands clean timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong 64
Scripted bosses and enemies
Oddworld: Abe's Exoddus
Scripted guards, no adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong 64
Little randomness; secrets known once found
Oddworld: Abe's Exoddus
Fixed level layouts
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong 64
Routing five Kongs through collectible checklists
Oddworld: Abe's Exoddus
Quicksave routing and 300 rescues reward planning
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.