head to head
Mario Kart 8 Deluxe asks more than Mario & Sonic at the London 2012 Olympic Games, and the gap is optimization.

Execution · Twitch Chaos
A kart racer where item luck collides with optimized lines and builds.

Execution · Twitch Chaos
An Olympic minigame collection testing short bursts of motion-control timing.
Mario Kart 8 Deluxe leans Execution (Twitch Chaos); Mario & Sonic at the London 2012 Olympic Games leans Execution (Twitch Chaos).
Mario Kart 8 Deluxe leans clearly harder on execution.
Mario Kart 8 Deluxe
Drift boosts, snaking, and item timing demand precision.
Mario & Sonic at the London 2012 Olympic Games
Waggle timing and button rhythm decide each event
Mario Kart 8 Deluxe leans a little harder on reads, though the gap is small.
Mario Kart 8 Deluxe
Human racers bait and block items but mostly reactive.
Mario & Sonic at the London 2012 Olympic Games
Party opponents are barely predictable or worth predicting
Mario Kart 8 Deluxe leans clearly harder on variance.
Mario Kart 8 Deluxe
Item distribution heavily randomized by position.
Mario & Sonic at the London 2012 Olympic Games
Event RNG and motion-control noise add slop
Mario Kart 8 Deluxe leans clearly harder on optimization.
Mario Kart 8 Deluxe
Kart build, line, and shortcut knowledge define top times.
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.