head to head
Mario Kart 8 Deluxe asks more than Mario & Sonic at the Olympic Games Tokyo 2020, and the gap is optimization.

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

Execution · Twitch Chaos
A party collection of timing minigames designed to keep everyone competitive.
Mario Kart 8 Deluxe leans Execution (Twitch Chaos); Mario & Sonic at the Olympic Games Tokyo 2020 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 Olympic Games Tokyo 2020
Button-timing and waggle minigames are the core test
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 Olympic Games Tokyo 2020
Light couch-PvP guessing in some head-to-head events
Mario Kart 8 Deluxe leans clearly harder on variance.
Mario Kart 8 Deluxe
Item distribution heavily randomized by position.
Mario & Sonic at the Olympic Games Tokyo 2020
Event RNG and party chaos level the field
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 Olympic Games Tokyo 2020
Each event has a shallow optimal technique to learn
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.