head to head
Live for Speed asks more than F-Zero X, and the gap is reads.

Execution · Pure Mechanics
The N64 entry whose boost-or-survive health gamble layers routing decisions onto raw speed control.

Execution · Pure Mechanics
A long-running hardcore racing simulator prized for its tire physics and online racing.
F-Zero X leans Execution (Pure Mechanics); Live for Speed leans Execution (Pure Mechanics).
Live for Speed leans a little harder on execution, though the gap is small.
F-Zero X
Sixty-frame control of thirty machines at top speed
Live for Speed
Hardcore sim handling rewards perfect car control
Live for Speed leans clearly harder on reads.
F-Zero X
Rival AI is non-adaptive
Live for Speed
Online racecraft against human rivals
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
F-Zero X
X Cup random tracks are a minor mode
Live for Speed
Deterministic physics, no weather lottery
Live for Speed leans a little harder on optimization, though the gap is small.
F-Zero X
Boost-health tradeoffs and shortcuts reward routing
Live for Speed
Setups and racing lines converge to known optima
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.