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 falling-block puzzle testing fast placement and chain-clear setups under pressure.

Execution · Practiced Mastery
A sword-and-gun action shooter rewarding combo timing mastery and careful upgrade investment against scripted demon hordes.
Kirby's Star Stacker leans Execution (Practiced Mastery); Shadow Warrior (2013) leans Execution (Practiced Mastery).
Shadow Warrior (2013) leans a little harder on execution, though the gap is small.
Kirby's Star Stacker
Fast block placement under rising pressure demands speed
Shadow Warrior (2013)
Sword combos and gunplay require precise timing and input chaining
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby's Star Stacker
Solo puzzle with no opponent to model
Shadow Warrior (2013)
All enemies are scripted demons with fixed attack patterns
Kirby's Star Stacker leans a little harder on variance, though the gap is small.
Kirby's Star Stacker
Falling-block sequence is random but rapidly mappable
Shadow Warrior (2013)
Upgrade drop randomness introduces mild run-to-run variance
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby's Star Stacker
Setting up cascading star clears is the strategy layer
Shadow Warrior (2013)
Ki power and upgrade tree investment form a meaningful build layer
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.