head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
A cartoonish horde shooter sequel of planet-hopping monster massacres.

Execution · Practiced Mastery
A co-op RPG-flavored Wolfenstein where twin sisters level up through occupied Paris.
Serious Sam 2 leans Execution (Practiced Mastery); Wolfenstein: Youngblood 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.
Serious Sam 2
Sustained horde-clearing aim and strafing
Wolfenstein: Youngblood
Gunplay still matters but levels gate by stats
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Serious Sam 2
Enemy waves are entirely scripted
Wolfenstein: Youngblood
Co-op versus scripted enemies, no adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Serious Sam 2
Cartoon set-pieces surprise once
Wolfenstein: Youngblood
Mission boards and loot add mild randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Serious Sam 2
Target priority and arena routes are learnable
Wolfenstein: Youngblood
RPG levels, weapon mods, and enemy armor types dominate
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.