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 · Practiced Mastery
A competitive puzzle mashup combining Puyo Puyo chains with Tetris stacking.

Execution · Pure Mechanics
Battle royale Tetris where raw stacking speed decides who outlasts 98 opponents.
Puyo Puyo Tetris 2 leans Execution (Practiced Mastery); Tetris 99 leans Execution (Pure Mechanics).
Tetris 99 leans a little harder on execution, though the gap is small.
Puyo Puyo Tetris 2
fast precise piece placement under pressure
Tetris 99
High-speed stacking and finesse define survival
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Puyo Puyo Tetris 2
human opponents bait garbage and timing
Tetris 99
Targeting and badge timing against humans matter mid-match
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Puyo Puyo Tetris 2
piece/bean randomization each match
Tetris 99
Incoming garbage timing and piece sequence add chaos
Puyo Puyo Tetris 2 leans a little harder on optimization, though the gap is small.
Puyo Puyo Tetris 2
chain-building and stacking theory mastery
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.