head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Pure Mechanics
A competitive kart racer testing drift-boost execution against human rivals.

Execution · Pure Mechanics
The first online Mario Kart, infamous for the execution-heavy snaking technique dominating play.
Crazyracing Kartrider leans Execution (Pure Mechanics); Mario Kart DS leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Crazyracing Kartrider
Drift-boost timing and tight cornering define lap speed
Mario Kart DS
Snaking demands relentless precise drift inputs
Crazyracing Kartrider leans a little harder on reads, though the gap is small.
Crazyracing Kartrider
Reading rival lines and item timing matters in PvP
Mario Kart DS
Online opponents punish predictable lines
Mario Kart DS leans a little harder on variance, though the gap is small.
Crazyracing Kartrider
Item pickups add some randomness to races
Mario Kart DS
Item RNG decides tight finishes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Crazyracing Kartrider
Track lines, drift chaining, and item usage are solvable
Mario Kart DS
Kart stats, lines, and snaking routes
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.