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.

Optimization · Pure Optimization
Deeper sequel turning occupied-Europe missions into intricate solvable stealth puzzles.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Commandos 2: Men of Courage leans Optimization (Pure Optimization); Fallout: New Vegas 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 2: Men of Courage
Multi-commando coordination under timing windows
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Commandos 2: Men of Courage
Scripted patrols with no adaptation
Fallout: New Vegas
Scripted factions and enemies
Fallout: New Vegas leans a little harder on variance, though the gap is small.
Commandos 2: Men of Courage
Vision cones shown; layouts fixed
Fallout: New Vegas
Some loot and crit RNG
Commandos 2: Men of Courage leans a little harder on optimization, though the gap is small.
Commandos 2: Men of Courage
Open-ended missions still reduce to solved routes
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
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.