head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Pure Mechanics
A twin-stick arena shooter testing aim and crowd-dodging under relentless swarms.

Execution · Pure Mechanics
The classic execution-under-acceleration test wrapped in an immersive audiovisual experience.
Robotron 64 leans Execution (Pure Mechanics); Tetris Effect: Connected leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Robotron 64
Twin-stick aiming and dodging swarms is the entire test
Tetris Effect: Connected
Precision placement under acceleration is the entire skill ceiling
Tetris Effect: Connected leans a little harder on reads, though the gap is small.
Robotron 64
Enemies follow scripted swarm AI, not adaptation
Tetris Effect: Connected
Zone-battle opponents exist but format leans on execution
Robotron 64 leans a little harder on variance, though the gap is small.
Robotron 64
Spawn waves add managed chaos each level
Tetris Effect: Connected
Piece bag is bounded random but quickly mappable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Robotron 64
Prioritizing targets and survival positioning supports survival
Tetris Effect: Connected
T-spin and stacking strategy is knowable but execution overrides it
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.