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
The foggy psychological horror landmark where dread, puzzles, and exploration outweigh combat skill.

Optimization · Practiced Mastery
Routing efficient digs and upgrades through a randomised mine.
Silent Hill leans Optimization (Pure Optimization); SteamWorld Dig leans Optimization (Practiced Mastery).
SteamWorld Dig leans a little harder on execution, though the gap is small.
Silent Hill
Combat is deliberately clumsy and forgiving
SteamWorld Dig
Digging and platforming need modest precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Silent Hill
Monsters follow fixed behaviors
SteamWorld Dig
Enemies follow simple fixed patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Silent Hill
First-run fog hides layout and puzzle information
SteamWorld Dig
Randomised mine layouts hide ore and hazards each run
Silent Hill leans a little harder on optimization, though the gap is small.
Silent Hill
Routes, puzzles, and endings fully converge on replay
SteamWorld Dig
Upgrade routing and efficient dig paths drive progress
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.