head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
Managing air meter and shortcut routes at speed on memorised tracks.

Execution · Practiced Mastery
Open-world racing MMO spanning a condensed United States.
Sonic Riders leans Execution (Practiced Mastery); The Crew 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.
Sonic Riders
Air management, drift timing and shortcuts demand practiced hands
The Crew
car control across long cross-country races
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Sonic Riders
Versus humans there is mild positional jockeying
The Crew
PvP races involve mild positional mind games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Sonic Riders
Item and turbulence placement adds light randomness
The Crew
traffic and open-world events add noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Sonic Riders
Gear choice and shortcut routes reward track study
The Crew
car specs and route choice are tunable
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.