head to head
Blur asks more than Micro Machines World Series, and the gap is optimization.

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

Execution · Pure Mechanics
Twitchy miniature racing where handling beats strategy on chaotic tabletop tracks.
Blur leans Execution (Pure Mechanics); Micro Machines World Series leans Execution (Pure Mechanics).
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
Micro Machines World Series
Tiny-car handling on cramped tabletop tracks is twitch-heavy
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
Micro Machines World Series
Human racers can be baited with weapons and blocks
Blur leans a little harder on variance, though the gap is small.
Blur
Power-up pickups and incoming attacks add chaos
Micro Machines World Series
Pickup spawns and battle chaos add randomness
Blur leans clearly harder on optimization.
Blur
Track knowledge and pickup routes are learnable
Micro Machines World Series
Track knowledge is shallow and learned quickly
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.