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

Execution · Pure Mechanics
A run-and-gun shooter where memorizing enemy patterns and precise dodging carries survival.

Execution · Pure Mechanics
Classic shmup reflexes over memorised wave patterns.
Metal Slug 4 leans Execution (Pure Mechanics); Silk Worm leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Slug 4
twitch dodging and shooting precision
Silk Worm
Weaving fire as helicopter or jeep is raw reflex
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Slug 4
fixed enemy waves, no adaptation
Silk Worm
Enemy waves never adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Slug 4
minor drop randomness
Silk Worm
Goose helicopter timing varies slightly with kills
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Metal Slug 4
memorized patterns and routes solvable
Silk Worm
Memorising wave patterns and power-up timing extends credits
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.