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.

Optimization · Systems & Chaos
Tests assembling broken card synergies under randomised offers, run after run.

Optimization · Systems & Chaos
A solo poker roguelike about engineering scoring engines from a randomised shop.
9 Kings leans Optimization (Systems & Chaos); Balatro leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
9 Kings
Placing cards between auto-battles needs no dexterity
Balatro
Drag-and-click cards; no mechanical demand at all.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
9 Kings
Rival kings follow fixed escalation, not adaptive minds
Balatro
No opponent; blinds are fixed scripted targets.
Balatro leans a little harder on variance, though the gap is small.
9 Kings
Card offers and enemy king draws randomise each run
Balatro
Shop offers and card draws gate every run.
Balatro leans a little harder on optimization, though the gap is small.
9 Kings
Stacking synergies into broken kingdom builds is the entire loop
Balatro
Joker synergies and scoring math are the core puzzle.
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.