head to head
Tetris DX asks more than Super Mario World, and the gap is execution.

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.

Execution · Pure Mechanics
Tests perceptual speed and motor execution under accelerating piece gravity.
Super Mario World leans Execution (Pure Mechanics); Tetris DX leans Execution (Pure Mechanics).
Tetris DX leans clearly harder on execution.
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Tetris DX
Precise placement under accelerating gravity decides every game
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario World
Scripted Koopas adapt to nothing
Tetris DX
Solo stacking with no opponent to model
Tetris DX leans a little harder on variance, though the gap is small.
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Tetris DX
Random pieces are bounded and rapidly mappable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Super Mario World
Secret exits and route knowledge add a modest solvable layer
Tetris DX
Stacking patterns and scoring strategy are well solved
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.