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 · Pure Mechanics
Arcade racing with Mario Kart-style power-ups bolted onto licensed cars.
Execution · Practiced Mastery
The original kart racer where drift technique fights item luck on Mode 7 tracks.
Blur leans Execution (Pure Mechanics); Super Mario Kart 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.
Blur
Racing lines and dodging shots demand car control
Super Mario Kart
Hop-drifting Mode 7 corners is genuinely technical
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Blur
Human racers bait and time power-ups against you
Super Mario Kart
Two-player battles reward predicting the rival
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
Super Mario Kart
Item rolls swing close races
Super Mario Kart leans a little harder on optimization, though the gap is small.
Blur
Track knowledge and pickup routes are learnable
Super Mario Kart
Racing lines and shortcut mastery
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.