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 · Pure Mechanics
VR rhythm game about slicing color-coded blocks to music with lightsabers.

Execution · Pure Mechanics
A PC rhythm game where matching colors on a spinning wheel turns charts into analog choreography.
Beat Saber leans Execution (Pure Mechanics); Spin Rhythm XD leans Execution (Pure Mechanics).
Beat Saber leans a little harder on execution, though the gap is small.
Beat Saber
Pure full-body rhythm precision at speed
Spin Rhythm XD
Wheel-spinning, flicks, and taps demand analog precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Beat Saber
No opponent of any kind
Spin Rhythm XD
Charts never adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Beat Saber
Patterns are fully known and fixed
Spin Rhythm XD
Deterministic charts
Spin Rhythm XD leans a little harder on optimization, though the gap is small.
Beat Saber
Swing-angle scoring technique and map memorization
Spin Rhythm XD
Chart study and controller technique choices
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.