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 reflex endless-hopper dodging randomized traffic for distance.

Execution · Twitch Chaos
An endless runner testing swipe reflexes against procedurally generated obstacle streams.
Disney Crossy Road leans Execution (Pure Mechanics); Subway Surfers leans Execution (Twitch Chaos).
Disney Crossy Road leans a little harder on execution, though the gap is small.
Disney Crossy Road
Precise tap timing to dodge traffic decides survival
Subway Surfers
Swipe reaction speed at increasing pace is everything
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Disney Crossy Road
Solo endless runner, no opponent to predict
Subway Surfers
No opponent - just oncoming obstacles
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Disney Crossy Road
Traffic and obstacle spawns are randomized hazards
Subway Surfers
Procedural track segments keep each run unseen ahead
Disney Crossy Road leans a little harder on optimization, though the gap is small.
Disney Crossy Road
Pattern recognition of lane timing improves runs slightly
Subway Surfers
Powerup upgrades matter little beyond reflex play
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.