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 · Pure Mechanics
A radio-controlled car racer through houses and supermarkets with weapon pickups and hidden shortcuts.

Execution · Pure Mechanics
An endless skiing runner testing reactive jump timing down a slope.
Re-Volt leans Execution (Pure Mechanics); Ski Safari leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Re-Volt
Twitchy RC car handling punishes sloppy steering
Ski Safari
Tap timing for jumps and mounts drives distance
Re-Volt leans a little harder on reads, though the gap is small.
Re-Volt
Multiplayer item duels add a thin mind-game layer
Ski Safari
Solo - no opponent to predict
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Re-Volt
Random pickups swing race outcomes
Ski Safari
Avalanche and terrain spawns randomized each run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Re-Volt
Shortcuts and car-class knowledge reward study
Ski Safari
Animal-mount switching strategy extends runs modestly
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.