head to head
Super Puyo Puyo 2 asks more than Dead Space (2008), and the gap is reads.

Execution · Practiced Mastery
Strategic dismemberment under resource pressure, solved by upgrade planning and practiced limb-aiming.

Execution · Practiced Mastery
A competitive falling-block puzzle about building chains under speed and opponent pressure.
Dead Space (2008) leans Execution (Practiced Mastery); Super Puyo Puyo 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Space (2008)
Precise limb-targeting under Necromorph pressure is the core skill
Super Puyo Puyo 2
Fast piece placement under accelerating drop is core
Super Puyo Puyo 2 leans clearly harder on reads.
Dead Space (2008)
Necromorphs follow fixed approach patterns, not player modelling
Super Puyo Puyo 2
Versus mode adds light anticipation of opponent chains
Super Puyo Puyo 2 leans a little harder on variance, though the gap is small.
Dead Space (2008)
Store stock is deterministic; minor drop variance on kills
Super Puyo Puyo 2
Piece order is random but quickly mappable
Super Puyo Puyo 2 leans a little harder on optimization, though the gap is small.
Dead Space (2008)
Weapon upgrading, power-node routing and stasis timing are optimisable
Super Puyo Puyo 2
Building large chain combos is the deep skill
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.