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 · Practiced Mastery
A neo-noir one-hit-kill action platformer about planning and replaying perfect assassinations.

Execution · Pure Mechanics
A marble-rolling platformer testing precise physics control for record times.
Katana ZERO leans Execution (Practiced Mastery); Marble It Up! leans Execution (Pure Mechanics).
Marble It Up! leans a little harder on execution, though the gap is small.
Katana ZERO
One-hit-death slashing and deflects demand precision
Marble It Up!
Frame-perfect marble control and boosting decide every run
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Katana ZERO
Enemies follow fixed placements and behaviours
Marble It Up!
Solo time-trials - no opponent to predict
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Katana ZERO
Rooms are identical on every attempt
Marble It Up!
Physics are deterministic, nothing random
Katana ZERO leans a little harder on optimization, though the gap is small.
Katana ZERO
Planning the perfect room-clear sequence
Marble It Up!
Finding optimal lines for record times rewards mastery
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.