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
Dash-precision platforming with solvable boss orders and upgrade routing.

Execution · Practiced Mastery
Open-world reboot of Mirror's Edge centered on free-running across the city of Glass.
Mega Man X5 leans Execution (Practiced Mastery); Mirror's Edge Catalyst 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.
Mega Man X5
Dash-jump precision and boss dodge timing demand clean hands
Mirror's Edge Catalyst
Flow-state parkour with timing-based combat
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mega Man X5
Mavericks cycle fixed attack patterns
Mirror's Edge Catalyst
Enemies are scripted obstacles
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mega Man X5
Random ending triggers add rare unmapped outcomes
Mirror's Edge Catalyst
Open world is static once explored
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mega Man X5
Armor parts, boss order and route knowledge solve the game
Mirror's Edge Catalyst
Time trials reward optimal route discovery
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.