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
NES boxing game built entirely on memorizing opponent tells and executing split-second counters.

Execution · Practiced Mastery
High-speed maze execution along planned score-maximizing routes.
Mike Tyson's Punch-Out!! leans Execution (Practiced Mastery); Pac-Man Championship Edition 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.
Mike Tyson's Punch-Out!!
Frame-tight dodges and counters, brutal at Tyson
Pac-Man Championship Edition 2
Cornering at top speed under pressure decides scores
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mike Tyson's Punch-Out!!
Every boxer follows fixed tells and patterns
Pac-Man Championship Edition 2
Ghost trains follow deterministic patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mike Tyson's Punch-Out!!
Almost fully deterministic once patterns are known
Pac-Man Championship Edition 2
Mazes and spawns are fixed per course
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mike Tyson's Punch-Out!!
Memorizing each opponent's pattern is half the game
Pac-Man Championship Edition 2
Score routes and ghost-train herding are deeply plannable
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.