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

Execution · Pure Mechanics
A bullet-grazing shoot-em-up about leveling by skimming enemy fire as closely as possible.
F-Zero X leans Execution (Pure Mechanics); Psyvariar Delta leans Execution (Pure Mechanics).
Psyvariar Delta leans a little harder on execution, though the gap is small.
F-Zero X
Sixty-frame control of thirty machines at top speed
Psyvariar Delta
Grazing bullets at the edge of death defines mastery
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
F-Zero X
Rival AI is non-adaptive
Psyvariar Delta
Enemy fire is scripted, not adaptive
Psyvariar Delta leans a little harder on variance, though the gap is small.
F-Zero X
X Cup random tracks are a minor mode
Psyvariar Delta
Patterns are fixed and memorizable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
F-Zero X
Boost-health tradeoffs and shortcuts reward routing
Psyvariar Delta
Buzz-chaining routes and leveling strategy reward planning
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.