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

Execution · Twitch Chaos
A fast twin-stick roguelite where chaotic item variance and precision shooting share the top bill.

Execution · Twitch Chaos
Twin-stick roguelike where a crying child fights basement horrors with random unholy upgrades.
Neon Abyss leans Execution (Twitch Chaos); The Binding of Isaac leans Execution (Twitch Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Neon Abyss
Fast twin-stick shooting against dense waves demands real input precision
The Binding of Isaac
Twin-stick dodging through bullet-dense rooms
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Neon Abyss
Enemies are scripted; no adaptive behaviour exists
The Binding of Isaac
Enemies follow fixed or random patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Neon Abyss
Item pool is enormous and chaotic; runs diverge unpredictably
The Binding of Isaac
Item and room RNG defines every run
The Binding of Isaac leans a little harder on optimization, though the gap is small.
Neon Abyss
Synergy stacking with passive items rewards pattern recognition
The Binding of Isaac
Item synergy knowledge converts luck into wins
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.