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
An early weapon-based fighting game built on execution and human matchup reads.

Execution · Pure Mechanics
A competitive online stacker testing raw speed and versus stacking strategy.
Soul Edge leans Execution (Pure Mechanics); Tetr.io leans Execution (Pure Mechanics).
Tetr.io leans a little harder on execution, though the gap is small.
Soul Edge
precise inputs, spacing, and combo timing
Tetr.io
Lightning-fast piece placement decides every match
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Soul Edge
human opponents can be out-predicted in neutral
Tetr.io
Human opponents in versus can be anticipated somewhat
Tetr.io leans a little harder on variance, though the gap is small.
Soul Edge
minimal randomness in outcomes
Tetr.io
Bag randomizer is bounded and quickly mappable
Tetr.io leans a little harder on optimization, though the gap is small.
Soul Edge
movelist knowledge and matchup optimization
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.