head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Practiced Mastery
Flipper timing against bouncing physics, with table missions rewarding memorised routes.

Execution · Twitch Chaos
Flipper execution and table knowledge with Pokémon-catching RNG on top.
3D Pinball: Space Cadet leans Execution (Practiced Mastery); Pokémon Pinball leans Execution (Twitch Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
3D Pinball: Space Cadet
Flipper timing and nudge control are the score ceiling
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.
3D Pinball: Space Cadet
A table cannot adapt to you
Pokémon Pinball
A pinball table has no mind
Pokémon Pinball leans a little harder on variance, though the gap is small.
3D Pinball: Space Cadet
Ball physics bounce beyond full control
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.
3D Pinball: Space Cadet
Mission sequences and table knowledge multiply scores
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.