head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Variance · Pure Chaos
Tests nothing but luck - a spectator marble race decided entirely by physics RNG.

Variance · Pure Chaos
A toy-like island sim about watching Miis fall in love, feud, and dream nonsense.
Marbles on Stream leans Variance (Pure Chaos); Tomodachi Life leans Variance (Pure Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Marbles on Stream
You watch a marble roll; no inputs matter
Tomodachi Life
Tapping menus, no skill ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Marbles on Stream
No opponent decisions exist to predict
Tomodachi Life
Miis run on random whimsy, not adaptation
Marbles on Stream leans a little harder on variance, though the gap is small.
Marbles on Stream
Physics RNG decides the entire race outcome
Tomodachi Life
Random events and relationships drive everything
Tomodachi Life leans a little harder on optimization, though the gap is small.
Marbles on Stream
Nothing to solve beyond picking a marble skin
Tomodachi Life
Gift logic exists but barely matters
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.