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

Execution · Practiced Mastery
Accessible kart racing where merging cars trades driving for turret chaos.

Execution · Practiced Mastery
Accessible car control amid demolition chaos rather than precision racing.
Crash Tag Team Racing leans Execution (Practiced Mastery); Dirt Showdown leans Execution (Practiced Mastery).
Dirt Showdown leans a little harder on execution, though the gap is small.
Crash Tag Team Racing
Driving and turret aim ask moderate kid-friendly hands
Dirt Showdown
Drifting, boosting and ramming need solid car control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crash Tag Team Racing
Clashing with humans adds slight positional guessing
Dirt Showdown
Demolition modes reward predicting human movement a little
Crash Tag Team Racing leans a little harder on variance, though the gap is small.
Crash Tag Team Racing
Item luck and clash chaos shake up races
Dirt Showdown
Crash physics and pack chaos add randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Crash Tag Team Racing
Track routes and car upgrades are quickly learnable
Dirt Showdown
Event types and boost routes are quickly learnable
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.