head to head
Mario Kart 8 asks more than Jetpack Joyride, and the gap is optimization.

Execution · Twitch Chaos
An endless runner where you steer a jetpack through randomised hazard corridors.

Execution · Twitch Chaos
A kart racer where controlled chaos from random items tempers otherwise precise driving skill.
Jetpack Joyride leans Execution (Twitch Chaos); Mario Kart 8 leans Execution (Twitch Chaos).
Mario Kart 8 leans a little harder on execution, though the gap is small.
Jetpack Joyride
One-touch dodging at rising speed is the whole test
Mario Kart 8
precise drifting and item timing matter
Mario Kart 8 leans a little harder on reads, though the gap is small.
Jetpack Joyride
No opponent of any kind
Mario Kart 8
minimal, mostly reacting not predicting
Mario Kart 8 leans a little harder on variance, though the gap is small.
Jetpack Joyride
Randomised obstacle layouts and power-up spawns each run
Mario Kart 8
item boxes are heavily randomized
Mario Kart 8 leans clearly harder on optimization.
Jetpack Joyride
Mission and gadget choices matter mildly
Mario Kart 8
track lines and item strategy solvable
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.