head to head
Returnal asks more than Nuclear Throne, and the gap is reads.

Execution · Twitch Chaos
Frenetic twin-stick roguelike where mutant builds meet unforgiving bullet dodging.

Execution · Twitch Chaos
Bullet-hell roguelike third-person shooter.
Nuclear Throne leans Execution (Twitch Chaos); Returnal 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.
Nuclear Throne
Twin-stick dodging in dense bullet chaos
Returnal
Bullet-hell dodge and aim under pressure
Returnal leans clearly harder on reads.
Nuclear Throne
Enemies follow fixed behaviors
Returnal
Bosses scripted, patterns not adaptive
Returnal leans a little harder on variance, though the gap is small.
Nuclear Throne
Weapon drops, mutations, and level generation per run
Returnal
Room layouts, parasites, items roguelike
Returnal leans a little harder on optimization, though the gap is small.
Nuclear Throne
Mutation synergies and crown-route knowledge
Returnal
Build synergies and route planning
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.