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

Execution · Practiced Mastery
Accessible car control amid demolition chaos rather than precision racing.

Execution · Practiced Mastery
A one-button Kirby racer whose chaotic City Trial mode became a cult multiplayer favourite.
Dirt Showdown leans Execution (Practiced Mastery); Kirby Air Ride 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.
Dirt Showdown
Drifting, boosting and ramming need solid car control
Kirby Air Ride
Charge-boost timing and machine handling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt Showdown
Demolition modes reward predicting human movement a little
Kirby Air Ride
Local multiplayer rivals add light prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt Showdown
Crash physics and pack chaos add randomness
Kirby Air Ride
City Trial patch and event randomness
Kirby Air Ride leans a little harder on optimization, though the gap is small.
Dirt Showdown
Event types and boost routes are quickly learnable
Kirby Air Ride
Machine stats and course lines are mappable
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.