head to head
Tetris 99 asks more than Super Mario World, and the gap is reads.

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

Execution · Pure Mechanics
Battle royale Tetris where raw stacking speed decides who outlasts 98 opponents.
Super Mario World leans Execution (Pure Mechanics); Tetris 99 leans Execution (Pure Mechanics).
Tetris 99 leans clearly harder on execution.
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
Tetris 99
High-speed stacking and finesse define survival
Tetris 99 leans clearly harder on reads.
Super Mario World
Scripted Koopas adapt to nothing
Tetris 99
Targeting and badge timing against humans matter mid-match
Tetris 99 leans clearly harder on variance.
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Tetris 99
Incoming garbage timing and piece sequence add chaos
Tetris 99 leans a little harder on optimization, though the gap is small.
Super Mario World
Secret exits and route knowledge add a modest solvable layer
Tetris 99
Stacking theory and downstack efficiency are studied skills
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.