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 · Twitch Chaos
An endless runner testing swipe reflexes against procedurally generated obstacle streams.

Execution · Pure Mechanics
Touch-screen reaction speed against a randomised barrage of microgames.
Subway Surfers leans Execution (Twitch Chaos); WarioWare: Touched! leans Execution (Pure Mechanics).
WarioWare: Touched! leans a little harder on execution, though the gap is small.
Subway Surfers
Swipe reaction speed at increasing pace is everything
WarioWare: Touched!
Instant stylus reactions to five-second prompts are everything
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Subway Surfers
No opponent - just oncoming obstacles
WarioWare: Touched!
No opponent - just escalating microgame speed
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Subway Surfers
Procedural track segments keep each run unseen ahead
WarioWare: Touched!
Random microgame order demands instant recognition
Subway Surfers leans a little harder on optimization, though the gap is small.
Subway Surfers
Powerup upgrades matter little beyond reflex play
WarioWare: Touched!
Each microgame is trivially solvable once recognised
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.