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

Execution · Practiced Mastery
A PS4 launch brawler starring a creature of relics that grows from tiny scrapper to building-sized titan.

Execution · Practiced Mastery
An open-structured Game Boy Mario where six zones guard coins that unlock Wario's castle.
Knack leans Execution (Practiced Mastery); Super Mario Land 2: 6 Golden Coins leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Knack
Dodge timing matters as fragile small Knack
Super Mario Land 2: 6 Golden Coins
Forgiving jumps but bosses still test timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Knack
Scripted goblin and robot patterns
Super Mario Land 2: 6 Golden Coins
No adaptive opposition anywhere
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Knack
Relic chest contents vary slightly
Super Mario Land 2: 6 Golden Coins
Secret exits hidden until discovered
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Knack
Size mechanics and gadget crafting are simple systems
Super Mario Land 2: 6 Golden Coins
Nonlinear zone order and secret levels 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.