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 helicopter shooter testing aim and maneuvering through scripted combat missions.

Execution · Practiced Mastery
A gothic horror FPS where a paranormal investigator fights a family curse with revolver in one hand and spells in the other.
Army Men: Air Attack 2 leans Execution (Practiced Mastery); Clive Barker's Undying 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.
Army Men: Air Attack 2
Helicopter aim and maneuvering timing matters
Clive Barker's Undying
Dual-wielding spells and guns under pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Army Men: Air Attack 2
Enemy units follow scripted AI, not adapting
Clive Barker's Undying
Horrors follow scripted patterns despite feeling malevolent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Army Men: Air Attack 2
Mission chaos and pickups add randomness
Clive Barker's Undying
First-run scares and unknown manor secrets hide information
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Army Men: Air Attack 2
Chopper and copilot loadout choices optimize missions
Clive Barker's Undying
Spell upgrades and Scrye-revealed puzzles reward system mastery
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.