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
Precision car control of vintage machinery refined through setup and line study.

Execution · Practiced Mastery
A precision metroidvania about learning fixed boss patterns and tight platforming.
GT Legends leans Execution (Practiced Mastery); Hollow Knight 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.
GT Legends
Historic cars without aids demand precise car control every corner
Hollow Knight
Precise platforming and pogo timing dominate hard content.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
GT Legends
Racecraft versus humans exists but pace dominates
Hollow Knight
Bosses run scripted attack pools; not adaptive.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
GT Legends
Conditions are known before the green flag
Hollow Knight
Negligible; world layout is fixed.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
GT Legends
Setup tuning and line study are where lap time lives
Hollow Knight
Charm builds and boss routes are fully learnable.
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.