head to head
Mario Kart 8 asks more than Madagascar Kartz, and the gap is variance.

Execution · Twitch Chaos
Kart racing with random item pickups and drift timing on themed tracks.

Execution · Twitch Chaos
A kart racer where controlled chaos from random items tempers otherwise precise driving skill.
Madagascar Kartz leans Execution (Twitch Chaos); Mario Kart 8 leans Execution (Twitch Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Madagascar Kartz
Steering, drifting and item timing matter in races
Mario Kart 8
precise drifting and item timing matter
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Madagascar Kartz
Rubber-band AI is scripted, not adaptive prediction
Mario Kart 8
minimal, mostly reacting not predicting
Mario Kart 8 leans clearly harder on variance.
Madagascar Kartz
Random item pickups swing race outcomes
Mario Kart 8
item boxes are heavily randomized
Mario Kart 8 leans a little harder on optimization, though the gap is small.
Madagascar Kartz
Track shortcuts and item management reward knowledge
Mario Kart 8
track lines and item strategy 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.