head to head
Tetr.io asks more than Grid 2, and the gap is execution.

Execution · Practiced Mastery
Cornering execution over memorisable circuits, with light prediction in wheel-to-wheel multiplayer.

Execution · Pure Mechanics
A competitive online stacker testing raw speed and versus stacking strategy.
Grid 2 leans Execution (Practiced Mastery); Tetr.io leans Execution (Pure Mechanics).
Tetr.io leans clearly harder on execution.
Grid 2
Car control through corners is the entire moment-to-moment test
Tetr.io
Lightning-fast piece placement decides every match
Tetr.io leans a little harder on reads, though the gap is small.
Grid 2
Online wheel-to-wheel adds light positional prediction
Tetr.io
Human opponents in versus can be anticipated somewhat
Tetr.io leans a little harder on variance, though the gap is small.
Grid 2
Tracks are fixed and fully visible
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.
Grid 2
Racing lines, braking points and car selection are studyable
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.