head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, 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 handheld Mario Kart blending SNES-style handling with item-fueled races.
Blur leans Execution (Pure Mechanics); Mario Kart: Super Circuit 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
Mario Kart: Super Circuit
Snappy GBA handling rewards precise drift control
Blur leans a little harder on reads, though the gap is small.
Blur
Human racers bait and time power-ups against you
Mario Kart: Super Circuit
Mostly AI races, light link-cable PvP
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
Mario Kart: Super Circuit
Item boxes randomise every race
Mario Kart: Super Circuit leans a little harder on optimization, though the gap is small.
Blur
Track knowledge and pickup routes are learnable
Mario Kart: Super Circuit
Time-trial lines and shortcut routes
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.