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
Drift execution and team-boost coordination under item-roll randomness.
Blur leans Execution (Pure Mechanics); Team Sonic Racing 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
Team Sonic Racing
Drift lines and boost timing decide lap pace
Blur leans a little harder on reads, though the gap is small.
Blur
Human racers bait and time power-ups against you
Team Sonic Racing
Online races add light rival positioning play
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
Team Sonic Racing
Item rolls swing positions mid-race
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
Team Sonic Racing
Team mechanics and car tuning add learnable layers
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.