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.

Optimization · Pure Optimization
Side-on turn-based tactics where you manually aim ricocheting bullets for a steambot pirate crew.

Optimization · Practiced Mastery
An action RPG where leveling means choosing which Londoners to drain.
SteamWorld Heist leans Optimization (Pure Optimization); Vampyr leans Optimization (Practiced Mastery).
Vampyr leans a little harder on execution, though the gap is small.
SteamWorld Heist
Manual aim and ricochet shots reward steady hands
Vampyr
Dodge-and-stamina melee combat with modest demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
SteamWorld Heist
Enemy bots follow fixed behaviors
Vampyr
Enemies follow scripted patterns
SteamWorld Heist leans a little harder on variance, though the gap is small.
SteamWorld Heist
Procedural ship layouts and loot drops
Vampyr
Citizen secrets are hidden until investigated
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
SteamWorld Heist
Crew builds, weapon picks, and turn routing carry runs
Vampyr
The feed-or-spare XP economy is the central solvable system
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.