head to head
Blur asks more than Runbow, and the gap is optimization.

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

Execution · Pure Mechanics
Reaction-speed platform racing where shifting colours keep redrawing the level under you.
Blur leans Execution (Pure Mechanics); Runbow 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
Runbow
Fast platform racing through vanishing platforms is pure reaction
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
Runbow
Light jostling with human racers, but little deep prediction
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
Runbow
Colour swaps and party chaos randomise each race
Blur leans clearly harder on optimization.
Blur
Track knowledge and pickup routes are learnable
Runbow
Minimal systems - momentum tricks and level memory only
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.