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

Optimization · Practiced Mastery
The 1986 original that defined exploration-driven, secret-riddled platforming.
Disney's DuckTales: The Quest for Gold leans Optimization (Pure Optimization); Metroid leans Optimization (Practiced Mastery).
Metroid leans a little harder on execution, though the gap is small.
Disney's DuckTales: The Quest for Gold
Flight minigame timing matters but is light
Metroid
stiff NES jumps and tough enemy contact
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
Metroid
creatures follow fixed movement
Disney's DuckTales: The Quest for Gold leans a little harder on variance, though the gap is small.
Disney's DuckTales: The Quest for Gold
Treasure locations and events add randomness
Metroid
unmarked secrets and bombable blocks hide the map
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
Metroid
route and item knowledge transforms the game
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.