head to head
Neither is simply harder - they are hard in different places. Mario Kart 64 demands more reads; Neon Abyss demands more variance.

Execution · Twitch Chaos
N64 couch classic where blue shells and shortcuts decide friendships.

Execution · Twitch Chaos
A fast twin-stick roguelite where chaotic item variance and precision shooting share the top bill.
Mario Kart 64 leans Execution (Twitch Chaos); Neon Abyss leans Execution (Twitch Chaos).
Neon Abyss leans a little harder on execution, though the gap is small.
Mario Kart 64
Mini-turbo snaking and shortcut execution
Neon Abyss
Fast twin-stick shooting against dense waves demands real input precision
Mario Kart 64 leans clearly harder on reads.
Mario Kart 64
Couch rivals bait shells and fakes
Neon Abyss
Enemies are scripted; no adaptive behaviour exists
Neon Abyss leans clearly harder on variance.
Mario Kart 64
Item draws swing every race
Neon Abyss
Item pool is enormous and chaotic; runs diverge unpredictably
Neon Abyss leans a little harder on optimization, though the gap is small.
Mario Kart 64
Shortcut and line knowledge is fully mapped
Neon Abyss
Synergy stacking with passive items rewards pattern recognition
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.