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 · Pure Mechanics
Arcade racing with Mario Kart-style power-ups bolted onto licensed cars.

Execution · Twitch Chaos
A kart racer testing drift handling and item use across American courses.
Blur leans Execution (Pure Mechanics); Mickey's Speedway USA leans Execution (Twitch Chaos).
Blur leans a little harder on execution, though the gap is small.
Blur
Racing lines and dodging shots demand car control
Mickey's Speedway USA
Kart handling and drift timing decide races
Blur leans a little harder on reads, though the gap is small.
Blur
Human racers bait and time power-ups against you
Mickey's Speedway USA
AI racers are scripted, no adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Blur
Power-up pickups and incoming attacks add chaos
Mickey's Speedway USA
Weapon item pickups add randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Blur
Track knowledge and pickup routes are learnable
Mickey's Speedway USA
Track knowledge and item usage reward learning
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.