head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
A turn-based tactics puzzle about chaining weapon transforms against bug waves.

Optimization · Pure Optimization
An auto-attacker where picking the right weapon evolutions wins by itself.
Morphblade leans Optimization (Pure Optimization); Vampire Survivors leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Morphblade
Turn-based movement removes any twitch demand
Vampire Survivors
Movement is trivial; no aim or precision required.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Morphblade
Bugs follow scripted behaviour, not modelling you
Vampire Survivors
Enemies follow fixed spawn scripts; no adaptive opponent.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Morphblade
Enemy spawn waves have randomised composition
Vampire Survivors
Level-up offerings and pickup drops are randomized.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Morphblade
Planning movement to chain weapon transforms optimally is the puzzle
Vampire Survivors
Evolution paths and weapon combinations fully solve the run.
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.