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 · Practiced Mastery
A gleefully absurd open-world crime game where the Saints conquer Steelport as celebrity gangsters.

Execution · Practiced Mastery
Managing air meter and shortcut routes at speed on memorised tracks.
Saints Row: The Third leans Execution (Practiced Mastery); Sonic Riders leans Execution (Practiced Mastery).
Sonic Riders leans a little harder on execution, though the gap is small.
Saints Row: The Third
Generous shooting and driving keep the skill bar moderate
Sonic Riders
Air management, drift timing and shortcuts demand practiced hands
Sonic Riders leans a little harder on reads, though the gap is small.
Saints Row: The Third
Enemy syndicates never adapt to you
Sonic Riders
Versus humans there is mild positional jockeying
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Saints Row: The Third
Sandbox mayhem injects light randomness
Sonic Riders
Item and turbulence placement adds light randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Saints Row: The Third
Upgrade trees and city-takeover income are straightforwardly maximised
Sonic Riders
Gear choice and shortcut routes reward track study
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.