head to head
Mario Kart World asks more than Arma 2, and the gap is variance.

Execution · Competitive PvP
A sprawling military simulator where realistic ballistics and planning beat reflexes.

Execution · Twitch Chaos
Kart racing blending drift execution with item RNG and pack positioning.
Arma 2 leans Execution (Competitive PvP); Mario Kart World 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.
Arma 2
Ballistics, stance, and positioning over twitch aim
Mario Kart World
Drift charging, rail grinding and shortcut precision reward hands
Arma 2 leans a little harder on reads, though the gap is small.
Arma 2
Human squads in PvP scenarios adapt
Mario Kart World
Human racers bait items and contest lines in knockouts
Mario Kart World leans clearly harder on variance.
Arma 2
Vast terrain hides enemy positions
Mario Kart World
Item rolls and rubber-banding scramble any single race
Arma 2 leans a little harder on optimization, though the gap is small.
Arma 2
Doctrine, loadouts, and mission planning
Mario Kart World
Course knowledge, shortcuts and item management converge with study
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.