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
A pure lane-timing reflex test against head-on collision cars.

Execution · Practiced Mastery
A playable pop album blending rhythm, racing, and shooting into a forgiving stylish ride.
Dodge 'Em leans Execution (Pure Mechanics); Sayonara Wild Hearts leans Execution (Practiced Mastery).
Dodge 'Em leans a little harder on execution, though the gap is small.
Dodge 'Em
Lane-switch timing against closing cars is the whole game
Sayonara Wild Hearts
Moderate dodging and timing, deliberately forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dodge 'Em
Computer cars chase head-on by simple fixed logic
Sayonara Wild Hearts
Scripted pop-album set pieces
Dodge 'Em leans a little harder on variance, though the gap is small.
Dodge 'Em
Opposing car spawns vary slightly per loop
Sayonara Wild Hearts
Fixed levels with memorizable layouts
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dodge 'Em
Optimal lane patterns are quickly learnable
Sayonara Wild Hearts
Gold-rank score chasing rewards route learning
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.