head to head
Stumble Guys asks more than Subway Surfers, and the gap is reads.

Variance · Twitch Chaos
Timing jumps through physics chaos where crowd randomness outweighs mastery.

Execution · Twitch Chaos
An endless runner testing swipe reflexes against procedurally generated obstacle streams.
Stumble Guys leans Variance (Twitch Chaos); Subway Surfers leans Execution (Twitch Chaos).
Subway Surfers leans a little harder on execution, though the gap is small.
Stumble Guys
Timing jumps through obstacle chaos is the main input
Subway Surfers
Swipe reaction speed at increasing pace is everything
Stumble Guys leans clearly harder on reads.
Stumble Guys
Light jostling with humans, little true prediction
Subway Surfers
No opponent - just oncoming obstacles
Stumble Guys leans clearly harder on variance.
Stumble Guys
Crowd physics and obstacle chaos randomize every round
Subway Surfers
Procedural track segments keep each run unseen ahead
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Stumble Guys
Shallow route knowledge is mastered quickly
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.