head to head
Mario Kart 8 asks more than Run, Sackboy! Run!, 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
An endless runner testing reaction timing against procedurally sequenced obstacles.
Mario Kart 8 leans Execution (Twitch Chaos); Run, Sackboy! Run! leans Execution (Twitch Chaos).
Mario Kart 8 leans a little harder on execution, though the gap is small.
Mario Kart 8
precise drifting and item timing matter
Run, Sackboy! Run!
Reaction jumps and slides at increasing speed
Mario Kart 8 leans a little harder on reads, though the gap is small.
Mario Kart 8
minimal, mostly reacting not predicting
Run, Sackboy! Run!
No opponent, just an advancing scripted threat
Mario Kart 8 leans clearly harder on variance.
Mario Kart 8
item boxes are heavily randomized
Run, Sackboy! Run!
Procedural track segments vary each run
Mario Kart 8 leans clearly harder on optimization.
Mario Kart 8
track lines and item strategy solvable
Run, Sackboy! Run!
Powerup economy is shallow and quickly learned
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.