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

Optimization · Pure Optimization
Real-time stealth tactics where each mission is a clockwork puzzle of guard routes.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Commandos: Behind Enemy Lines leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Commandos: Behind Enemy Lines
Timing guard windows takes precise clicks
Portal
Portal placement timing modest.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Commandos: Behind Enemy Lines
Patrols are fixed routes, never adaptive
Portal
No adversary modeling player.
Commandos: Behind Enemy Lines leans a little harder on variance, though the gap is small.
Commandos: Behind Enemy Lines
All guard cones and routes are visible
Portal
Deterministic chambers; no randomness.
Commandos: Behind Enemy Lines leans a little harder on optimization, though the gap is small.
Commandos: Behind Enemy Lines
Each mission is a solvable stealth puzzle
Portal
Pure puzzle-solving optimization.
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.