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 forgiving brawler-platformer where hijacking the right monster is the only decision.

Execution · Practiced Mastery
A light test of cover-shooter aim with spells substituting for guns.
Crash of the Titans leans Execution (Practiced Mastery); Harry Potter and the Deathly Hallows: Part 2 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.
Crash of the Titans
Combo brawling and titan-jacking need light timing
Harry Potter and the Deathly Hallows: Part 2
Basic cover-shooter aim with generous targeting
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crash of the Titans
Titans are scripted mounts, not minds
Harry Potter and the Deathly Hallows: Part 2
Enemies follow simple fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crash of the Titans
Levels are linear and fixed
Harry Potter and the Deathly Hallows: Part 2
Encounters are identical every run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Crash of the Titans
Choosing which titan to ride is shallow strategy
Harry Potter and the Deathly Hallows: Part 2
Spell selection per enemy type is a thin solvable layer
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.