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 · Practiced Mastery
A kart racer demanding precise boost-chain execution and route optimisation over item luck.

Execution · Pure Mechanics
The first online Mario Kart, infamous for the execution-heavy snaking technique dominating play.
Crash Team Racing Nitro-Fueled leans Execution (Practiced Mastery); 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.
Crash Team Racing Nitro-Fueled
Boost-chain execution and power-slide timing are the lead skill
Mario Kart DS
Snaking demands relentless precise drift inputs
Mario Kart DS leans a little harder on reads, though the gap is small.
Crash Team Racing Nitro-Fueled
Human multiplayer has light item-use anticipation
Mario Kart DS
Online opponents punish predictable lines
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crash Team Racing Nitro-Fueled
Item boxes and battle pickups introduce real outcome randomness
Mario Kart DS
Item RNG decides tight finishes
Crash Team Racing Nitro-Fueled leans a little harder on optimization, though the gap is small.
Crash Team Racing Nitro-Fueled
Track-specific boost chains and shortcut routes are fully memorisable
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.