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 kids' shooter of matching mask powers to obvious obstacles.

Execution · Practiced Mastery
A forgiving brawler-platformer where hijacking the right monster is the only decision.
Bionicle Heroes leans Execution (Practiced Mastery); Crash of the Titans 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.
Bionicle Heroes
Lock-on shooting keeps physical demands low
Crash of the Titans
Combo brawling and titan-jacking need light timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Bionicle Heroes
Enemy robots run on simple scripts
Crash of the Titans
Titans are scripted mounts, not minds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Bionicle Heroes
Piece drops are plentiful and uniform
Crash of the Titans
Levels are linear and fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Bionicle Heroes
Mask-power swapping maps obviously to obstacles
Crash of the Titans
Choosing which titan to ride is shallow strategy
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.