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
An endless arcade runner testing reflexes against scrolling hazards.

Execution · Twitch Chaos
Flipper execution and table knowledge with Pokémon-catching RNG on top.
Nyan Cat: Lost In Space leans Execution (Pure Mechanics); Pokémon Pinball leans Execution (Twitch Chaos).
Nyan Cat: Lost In Space leans a little harder on execution, though the gap is small.
Nyan Cat: Lost In Space
Precise dodging and platform timing decides survival
Pokémon Pinball
Flipper timing and nudge control are the whole input
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Nyan Cat: Lost In Space
No opponent to predict; scripted hazards
Pokémon Pinball
A pinball table has no mind
Pokémon Pinball leans a little harder on variance, though the gap is small.
Nyan Cat: Lost In Space
Procedural obstacle layouts add some unpredictability
Pokémon Pinball
Ball physics and catch-mode rolls add real randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Nyan Cat: Lost In Space
Upgrade choices and route knowledge improve runs
Pokémon Pinball
Mode routing and table knowledge raise scores predictably
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.