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

Execution · Light / Casual
A casual licensed action game testing little beyond light co-op coordination.

Execution · Light / Casual
A breezy co-op brawler that tests little beyond button mashing with a friend.
Harry Potter and the Goblet of Fire leans Execution (Light / Casual); Spider-Man: Friend or Foe leans Execution (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter and the Goblet of Fire
Simple co-op spell casting with generous timing
Spider-Man: Friend or Foe
Simple combo mashing clears nearly everything
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter and the Goblet of Fire
Enemies are fixed waves, no adaptation
Spider-Man: Friend or Foe
Enemies attack on basic fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter and the Goblet of Fire
Collectible bean locations are fixed
Spider-Man: Friend or Foe
Levels and unlocks are fixed throughout
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Harry Potter and the Goblet of Fire
Light card collection and spell upgrade choices
Spider-Man: Friend or Foe
Sidekick picks and upgrade tokens barely matter
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.