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

Optimization · Pure Optimization
A money-making strategy game about routing investments and treasure hunts efficiently.

Optimization · Practiced Mastery
Routing efficient digs and upgrades through a randomised mine.
Disney's DuckTales: The Quest for Gold leans Optimization (Pure Optimization); SteamWorld Dig leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Disney's DuckTales: The Quest for Gold
Flight minigame timing matters but is light
SteamWorld Dig
Digging and platforming need modest precision
Disney's DuckTales: The Quest for Gold leans a little harder on reads, though the gap is small.
Disney's DuckTales: The Quest for Gold
No adaptive opponent, AI rivals are scripted
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.
Disney's DuckTales: The Quest for Gold
Treasure locations and events add randomness
SteamWorld Dig
Randomised mine layouts hide ore and hazards each run
Disney's DuckTales: The Quest for Gold leans a little harder on optimization, though the gap is small.
Disney's DuckTales: The Quest for Gold
Managing cash, investments and route is the core loop
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.