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

Execution · Twitch Chaos
A kart racer with random items and drift timing on themed circuits.

Execution · Pure Mechanics
A radio-controlled car racer through houses and supermarkets with weapon pickups and hidden shortcuts.
Cartoon Network Racing leans Execution (Twitch Chaos); Re-Volt leans Execution (Pure Mechanics).
Re-Volt leans a little harder on execution, though the gap is small.
Cartoon Network Racing
Steering, drifting and item timing decide races
Re-Volt
Twitchy RC car handling punishes sloppy steering
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Cartoon Network Racing
AI racers scripted, no adaptive prediction
Re-Volt
Multiplayer item duels add a thin mind-game layer
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Cartoon Network Racing
Random item pickups swing race outcomes
Re-Volt
Random pickups swing race outcomes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Cartoon Network Racing
Shortcuts and item use reward track knowledge
Re-Volt
Shortcuts and car-class knowledge reward study
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.