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
High-speed cyborg slasher built on precise parries and slicing anything in half.

Execution · Practiced Mastery
A Capcom side-scrolling shoot-em-up with a shop economy between missions.
Metal Gear Rising: Revengeance leans Execution (Practiced Mastery); U.N. Squadron 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.
Metal Gear Rising: Revengeance
parry timing and blade-mode cuts demand sharp reactions
U.N. Squadron
Dodging dense fire and boss patterns is the test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Rising: Revengeance
bosses telegraph fixed patterns
U.N. Squadron
Enemy waves are fully scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Rising: Revengeance
deterministic encounters
U.N. Squadron
Deterministic stages once memorized
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Gear Rising: Revengeance
learning movesets and upgrade priorities
U.N. Squadron
Shop purchases, pilot choice, and pattern routes
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.