head to head
Mario Kart 64 asks more than Zombie Tsunami, and the gap is reads.

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

Execution · Twitch Chaos
One-touch reflex timing against procedurally generated obstacle streams.
Mario Kart 64 leans Execution (Twitch Chaos); Zombie Tsunami 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.
Mario Kart 64
Mini-turbo snaking and shortcut execution
Zombie Tsunami
One-touch jump timing for a growing horde is the whole test
Mario Kart 64 leans clearly harder on reads.
Mario Kart 64
Couch rivals bait shells and fakes
Zombie Tsunami
No opponent - obstacles are procedural
Mario Kart 64 leans a little harder on variance, though the gap is small.
Mario Kart 64
Item draws swing every race
Zombie Tsunami
Procedural level generation decides what each run offers
Mario Kart 64 leans a little harder on optimization, though the gap is small.
Mario Kart 64
Shortcut and line knowledge is fully mapped
Zombie Tsunami
Upgrade spending is a thin meta layer
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.