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
A reflex obstacle-course game about timing jumps and dodges through deadly stages.

Execution · Pure Mechanics
Classic Tetris execution under audiovisual flow, speed still decides everything.
Aztec Challenge leans Execution (Pure Mechanics); Tetris Effect leans Execution (Pure Mechanics).
Aztec Challenge leans a little harder on execution, though the gap is small.
Aztec Challenge
Reacting to spears, traps and pits with precise timing wins
Tetris Effect
Piece placement under speed and Zone timing is the whole test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Aztec Challenge
No adaptive opponent in a scripted obstacle gauntlet
Tetris Effect
Solo experience with no opponent to model
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Aztec Challenge
Some randomness in projectile timing
Tetris Effect
Randomised bag is bounded and quickly mappable
Tetris Effect leans a little harder on optimization, though the gap is small.
Aztec Challenge
Pattern memorisation of each level underneath
Tetris Effect
Stacking theory and Zone usage have known optimal lines
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.