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
Retro ninja platformer that flips from linear levels into a time-hopping metroidvania.

Execution · Practiced Mastery
Arcade run-and-gun reflexes over memorised enemy placements.
The Messenger leans Execution (Practiced Mastery); Top Gunner 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.
The Messenger
cloudstep chains demand precise aerial control
Top Gunner
Dodging bullet streams in the jeep is pure arcade reflex
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
The Messenger
enemies and bosses are fully scripted
Top Gunner
Enemy emplacements fire on fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
The Messenger
deterministic level design
Top Gunner
Layouts never change between credits
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The Messenger
upgrade economy and late-game route knowledge
Top Gunner
Memorising spawn points and POW routes maximises score runs
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.