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.

Execution · Pure Mechanics
The NES light-gun classic of shooting ducks and enduring the dog.

Execution · Pure Mechanics
A raw reaction-time test against randomised quick-draw timers.
Duck Hunt leans Execution (Pure Mechanics); Wild Gunman leans Execution (Pure Mechanics).
Wild Gunman leans a little harder on execution, though the gap is small.
Duck Hunt
Pure light-gun aim and reaction speed
Wild Gunman
Pure draw-speed reaction to the fire signal
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Duck Hunt
Ducks fly on simple patterns
Wild Gunman
Gunmen are timers, not minds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Duck Hunt
Flight paths vary a little
Wild Gunman
Which gunman draws and when is randomised
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Duck Hunt
Almost nothing to optimise beyond aim
Wild Gunman
Nothing to solve beyond reacting faster
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.