head to head
Mario Kart 8 asks more than Pokémon Pinball, and the gap is variance.

Execution · Twitch Chaos
A kart racer where controlled chaos from random items tempers otherwise precise driving skill.

Execution · Twitch Chaos
Flipper execution and table knowledge with Pokémon-catching RNG on top.
Mario Kart 8 leans Execution (Twitch Chaos); 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.
Mario Kart 8
precise drifting and item timing matter
Pokémon Pinball
Flipper timing and nudge control are the whole input
Mario Kart 8 leans a little harder on reads, though the gap is small.
Mario Kart 8
minimal, mostly reacting not predicting
Pokémon Pinball
A pinball table has no mind
Mario Kart 8 leans clearly harder on variance.
Mario Kart 8
item boxes are heavily randomized
Pokémon Pinball
Ball physics and catch-mode rolls add real randomness
Mario Kart 8 leans a little harder on optimization, though the gap is small.
Mario Kart 8
track lines and item strategy solvable
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.