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
Twitch dodging and shooting over fully memorisable enemy wave patterns.

Execution · Practiced Mastery
Retro ninja platformer that flips from linear levels into a time-hopping metroidvania.
Star Soldier leans Execution (Practiced Mastery); The Messenger leans Execution (Practiced Mastery).
Star Soldier leans a little harder on execution, though the gap is small.
Star Soldier
Dodging dense fire and rapid shooting carry every run
The Messenger
cloudstep chains demand precise aerial control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Star Soldier
Enemy waves are identical scripted formations
The Messenger
enemies and bosses are fully scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Star Soldier
Nothing random once spawn patterns are learned
The Messenger
deterministic level design
Star Soldier leans a little harder on optimization, though the gap is small.
Star Soldier
Memorising waves and power-up routes defines high scores
The Messenger
upgrade economy and late-game route knowledge
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.