head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
A fast mech-action game where assembling the right build and piloting it hard both decide bosses.

Execution · Practiced Mastery
A medieval-flavored Doom prequel built around shield parries and heavy combat.
Armored Core VI: Fires of Rubicon leans Execution (Practiced Mastery); Doom: The Dark Ages 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.
Armored Core VI: Fires of Rubicon
Boss fights demand sharp dodges and stagger timing
Doom: The Dark Ages
Parry timing and shield play demand precise inputs
Armored Core VI: Fires of Rubicon leans a little harder on reads, though the gap is small.
Armored Core VI: Fires of Rubicon
Campaign bosses are scripted; PvP is niche
Doom: The Dark Ages
Demon attack patterns are fixed and learnable
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Armored Core VI: Fires of Rubicon
Fixed encounters
Doom: The Dark Ages
Encounters fully scripted
Armored Core VI: Fires of Rubicon leans a little harder on optimization, though the gap is small.
Armored Core VI: Fires of Rubicon
Build crafting trivializes many bosses
Doom: The Dark Ages
Upgrade paths and combat-loop mastery solve fights
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.