head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
A kart racer with an adventure structure and three vehicle types, lighter on item chaos than its rivals.

Execution · Practiced Mastery
A maze action game testing dodging and shooting while grabbing treasure.
Diddy Kong Racing leans Execution (Practiced Mastery); Venture 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.
Venture
Dodging and shooting in tight rooms needs reflexes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Diddy Kong Racing
Multiplayer item duels add mild prediction; AI is scripted.
Venture
Monsters follow scripts, not adaptive 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.
Venture
Enemy movement adds minor unpredictability
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.
Venture
Learning room layouts and the invincible-chaser timing rewards play
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.