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
Dark-fantasy Doom-engine shooter trading shotguns for elven wands and tomes.

Execution · Practiced Mastery
Magic-as-guns FPS campaign through a war between battlemage legions.
Heretic leans Execution (Practiced Mastery); Immortals of Aveum 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.
Heretic
Classic FPS strafing and aim
Immortals of Aveum
Spell-slinging aim and dodge timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Heretic
Monsters follow fixed 90s AI
Immortals of Aveum
Enemy mages run scripted AI
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Heretic
Static level layouts
Immortals of Aveum
Minor loot randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Heretic
Secret hunting, item hoarding, and route knowledge
Immortals of Aveum
Sigil loadouts and talent-tree choices
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.