head to head
Mario Kart 8 asks more than Mario & Sonic at the London 2012 Olympic Games, 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 Olympic minigame collection testing short bursts of motion-control timing.
Mario Kart 8 leans Execution (Twitch Chaos); Mario & Sonic at the London 2012 Olympic Games 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
Mario & Sonic at the London 2012 Olympic Games
Waggle timing and button rhythm decide each event
Mario & Sonic at the London 2012 Olympic Games leans a little harder on reads, though the gap is small.
Mario Kart 8
minimal, mostly reacting not predicting
Mario & Sonic at the London 2012 Olympic Games
Party opponents are barely predictable or worth predicting
Mario Kart 8 leans clearly harder on variance.
Mario Kart 8
item boxes are heavily randomized
Mario & Sonic at the London 2012 Olympic Games
Event RNG and motion-control noise add slop
Mario Kart 8 leans clearly harder on optimization.
Mario Kart 8
track lines and item strategy solvable
Mario & Sonic at the London 2012 Olympic Games
Per-event tricks are learned in minutes
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.