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 · Twitch Chaos
Flipper execution and table knowledge with Pokémon-catching RNG on top.

Execution · Pure Mechanics
A marble-shooting puzzle where you match colours before the chain reaches the skull.
Pokémon Pinball leans Execution (Twitch Chaos); Zuma leans Execution (Pure Mechanics).
Zuma leans a little harder on execution, though the gap is small.
Pokémon Pinball
Flipper timing and nudge control are the whole input
Zuma
Fast accurate shots under chain pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Pinball
A pinball table has no mind
Zuma
No adaptive opponent
Pokémon Pinball leans a little harder on variance, though the gap is small.
Pokémon Pinball
Ball physics and catch-mode rolls add real randomness
Zuma
Ball colour feed is random
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Pinball
Mode routing and table knowledge raise scores predictably
Zuma
Chain setups, gap shots, combo planning
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.