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
Looking Glass's 1996 squad-command sim of powered-armor combat on alien battlefields.

Optimization · Practiced Mastery
An open-world action game about blowing up Nazi installations across a stylized black-and-white Paris.
Terra Nova: Strike Force Centauri leans Execution (Practiced Mastery); The Saboteur leans Optimization (Practiced Mastery).
Terra Nova: Strike Force Centauri leans a little harder on execution, though the gap is small.
Terra Nova: Strike Force Centauri
Piloting powered armor and aiming under fire is demanding
The Saboteur
Climbing, driving and shootouts need moderate dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Terra Nova: Strike Force Centauri
Enemy forces follow mission scripts, never adapt
The Saboteur
Nazi alarm AI follows predictable suspicion rules
Terra Nova: Strike Force Centauri leans a little harder on variance, though the gap is small.
Terra Nova: Strike Force Centauri
Unknown enemy placements on first mission attempts
The Saboteur
Patrols vary slightly across the open city
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Terra Nova: Strike Force Centauri
Squad orders, loadouts and approach routes are plannable
The Saboteur
Plotting demolition targets and escape routes is the game
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.