head to head
Mario Kart 8 Deluxe asks more than Mario Kart Wii, and the gap is reads.

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

Execution · Twitch Chaos
A classic kart racer balancing precise driving against heavily randomized item chaos.
Mario Kart 8 Deluxe leans Execution (Twitch Chaos); Mario Kart Wii leans Execution (Twitch Chaos).
Mario Kart 8 Deluxe leans a little harder on execution, though the gap is small.
Mario Kart 8 Deluxe
Drift boosts, snaking, and item timing demand precision.
Mario Kart Wii
drift timing and tricks require precision
Mario Kart 8 Deluxe leans clearly harder on reads.
Mario Kart 8 Deluxe
Human racers bait and block items but mostly reactive.
Mario Kart Wii
minimal opponent prediction, mostly reactive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Kart 8 Deluxe
Item distribution heavily randomized by position.
Mario Kart Wii
blue shells and items are random
Mario Kart 8 Deluxe leans a little harder on optimization, though the gap is small.
Mario Kart 8 Deluxe
Kart build, line, and shortcut knowledge define top times.
Mario Kart Wii
routes and item strategy are 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.