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.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.

Optimization · Pure Optimization
A touch-controlled DS Zelda about puzzling through dungeons and driving a train across Hyrule.
The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization); The Legend of Zelda: Spirit Tracks leans Optimization (Pure Optimization).
The Legend of Zelda: Spirit Tracks leans a little harder on execution, though the gap is small.
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
The Legend of Zelda: Spirit Tracks
Stylus combat and flute playing are forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
The Legend of Zelda: Spirit Tracks
Phantoms patrol on fixed rules
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
The Legend of Zelda: Spirit Tracks
Unknown layouts only until explored
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The Elder Scrolls V: Skyrim
Skill stacking, enchant loops, and exploits are deeply solvable.
The Legend of Zelda: Spirit Tracks
Rail routing and tower puzzles are the core
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.