head to head
Tetr.io 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 competitive online stacker testing raw speed and versus stacking strategy.
F-Zero X leans Execution (Pure Mechanics); Tetr.io leans Execution (Pure Mechanics).
Tetr.io leans a little harder on execution, though the gap is small.
F-Zero X
Sixty-frame control of thirty machines at top speed
Tetr.io
Lightning-fast piece placement decides every match
Tetr.io leans clearly harder on reads.
F-Zero X
Rival AI is non-adaptive
Tetr.io
Human opponents in versus can be anticipated somewhat
Tetr.io leans a little harder on variance, though the gap is small.
F-Zero X
X Cup random tracks are a minor mode
Tetr.io
Bag randomizer is bounded and quickly mappable
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
Tetr.io
Stacking and garbage-management strategy underneath the speed
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.