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 with an adventure structure and three vehicle types, lighter on item chaos than its rivals.

Execution · Practiced Mastery
DOS-era kart racer with animal drivers flinging hedgehogs at each other.
Diddy Kong Racing leans Execution (Practiced Mastery); Wacky Wheels leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Diddy Kong Racing
Drift boosts across car, hovercraft and plane demand precision.
Wacky Wheels
Cornering lines and hedgehog shots demand steady inputs.
Wacky Wheels leans a little harder on reads, though the gap is small.
Diddy Kong Racing
Multiplayer item duels add mild prediction; AI is scripted.
Wacky Wheels
Split-screen rivals add light human prediction.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Diddy Kong Racing
Balloon pickups and items inject moderate randomness.
Wacky Wheels
Item pickups and AI rubber-banding inject randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Diddy Kong Racing
Vehicle choice, balloon upgrade routes and boss strategies converge.
Wacky Wheels
Track memorization and shortcut routing converge fast.
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.