head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Pure Mechanics
A rail-shooter score test of raw accuracy over fully memorised spawn patterns.

Execution · Practiced Mastery
Retro ninja platformer that flips from linear levels into a time-hopping metroidvania.
The House of the Dead: Remake leans Execution (Pure Mechanics); The Messenger leans Execution (Practiced Mastery).
The House of the Dead: Remake leans a little harder on execution, though the gap is small.
The House of the Dead: Remake
An aimbot trivialises it - accuracy and reload timing are everything
The Messenger
cloudstep chains demand precise aerial control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
The House of the Dead: Remake
Zombies spawn on rails, never adapting
The Messenger
enemies and bosses are fully scripted
The House of the Dead: Remake leans a little harder on variance, though the gap is small.
The House of the Dead: Remake
Branching paths and item spots are quickly mapped
The Messenger
deterministic level design
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The House of the Dead: Remake
Memorising spawn orders and routes defines high scores
The Messenger
upgrade economy and late-game route knowledge
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.