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.

Optimization · Practiced Mastery
Active dodge-heavy combat with a deep build system, tested against both scripted content and human opponents.

Execution · Practiced Mastery
A competitive falling-block puzzle about building chains under speed and opponent pressure.
Guild Wars 2 leans Optimization (Practiced Mastery); Super Puyo Puyo 2 leans Execution (Practiced Mastery).
Super Puyo Puyo 2 leans a little harder on execution, though the gap is small.
Guild Wars 2
Dodge timing and active combat define moment-to-moment play
Super Puyo Puyo 2
Fast piece placement under accelerating drop is core
Guild Wars 2 leans a little harder on reads, though the gap is small.
Guild Wars 2
WvW and structured PvP feature real adaptive opponents
Super Puyo Puyo 2
Versus mode adds light anticipation of opponent chains
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Guild Wars 2
Loot RNG is present but secondary to skill expression
Super Puyo Puyo 2
Piece order is random but quickly mappable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Guild Wars 2
Build crafting and rotation theory-crafting reward deep analysis
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.