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

Execution · Twitch Chaos
Kart racing where driving skill fights a steady drizzle of random gag items.

Execution · Twitch Chaos
N64 couch classic where blue shells and shortcuts decide friendships.
Looney Tunes: Space Race leans Execution (Twitch Chaos); Mario Kart 64 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.
Looney Tunes: Space Race
Racing lines and drift control still decide most finishes
Mario Kart 64
Mini-turbo snaking and shortcut execution
Mario Kart 64 leans a little harder on reads, though the gap is small.
Looney Tunes: Space Race
Light gag-timing duels against human racers
Mario Kart 64
Couch rivals bait shells and fakes
Mario Kart 64 leans a little harder on variance, though the gap is small.
Looney Tunes: Space Race
Random gag pickups scramble race outcomes
Mario Kart 64
Item draws swing every race
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Looney Tunes: Space Race
Shortcut and track knowledge compound every lap
Mario Kart 64
Shortcut and line knowledge is fully mapped
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.