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
Raw paddle reflexes keeping a bouncing clown alive against balloon rows.

Execution · Pure Mechanics
The NES light-gun classic of shooting ducks and enduring the dog.
Circus Atari leans Execution (Pure Mechanics); Duck Hunt leans Execution (Pure Mechanics).
Circus Atari leans a little harder on execution, though the gap is small.
Circus Atari
Paddle precision under the falling clown is everything
Duck Hunt
Pure light-gun aim and reaction speed
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Circus Atari
No opponent - pure physics reaction
Duck Hunt
Ducks fly on simple patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Circus Atari
Bounce angles add slight unpredictability
Duck Hunt
Flight paths vary a little
Circus Atari leans a little harder on optimization, though the gap is small.
Circus Atari
Balloon-row targeting strategy is thin but present
Duck Hunt
Almost nothing to optimise beyond aim
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.