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 · Twitch Chaos
Reaction-swiping through procedurally assembled obstacle runs.
Pokémon Pinball leans Execution (Twitch Chaos); Sonic Dash leans Execution (Twitch Chaos).
Pokémon Pinball leans a little harder on execution, though the gap is small.
Pokémon Pinball
Flipper timing and nudge control are the whole input
Sonic Dash
Swipe reactions at speed are the entire test
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
Sonic Dash
No opponent of any kind
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Pokémon Pinball
Ball physics and catch-mode rolls add real randomness
Sonic Dash
Procedural track segments keep each run unmemorisable
Pokémon Pinball leans a little harder on optimization, though the gap is small.
Pokémon Pinball
Mode routing and table knowledge raise scores predictably
Sonic Dash
Upgrade and power-up choices nudge scores modestly
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.