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
Pachinko-puzzle hybrid where one lucky bounce triggers Ode to Joy.

Variance · Systems & Chaos
Navigating randomised stalker pressure that converges to route knowledge once the rules are learned.
Peggle leans Variance (Pure Chaos); Slender: The Arrival leans Variance (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Peggle
Aiming the launcher is gentle
Slender: The Arrival
Walking and looking away require no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Peggle
No opposition whatsoever
Slender: The Arrival
Slender Man is randomised stalking logic, not a mind
Peggle leans a little harder on variance, though the gap is small.
Peggle
Bounce physics chaos decides most shots
Slender: The Arrival
Spawn timing and page locations shuffle every attempt
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Peggle
Angle planning and power choice for setups
Slender: The Arrival
Route knowledge and collection order converge once rules are mapped
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.