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 · Practiced Mastery
Planning squad approaches to scripted missions where one mistake kills.

Execution · Practiced Mastery
Global flight sim built on real weather and procedures.
Hidden & Dangerous 2 leans Optimization (Practiced Mastery); Microsoft Flight Simulator (2020) 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.
Hidden & Dangerous 2
Deliberate aim and stealth movement punish sloppy hands
Microsoft Flight Simulator (2020)
Procedure execution, instrument flying skill
Hidden & Dangerous 2 leans a little harder on reads, though the gap is small.
Hidden & Dangerous 2
German AI follows patrol scripts, not adapting to you
Microsoft Flight Simulator (2020)
No adaptive opponents, ATC scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Hidden & Dangerous 2
Patrol routes and enemy positions are unknown first attempt
Microsoft Flight Simulator (2020)
Real weather and live traffic
Hidden & Dangerous 2 leans a little harder on optimization, though the gap is small.
Hidden & Dangerous 2
Squad planning, loadouts and approach routing decide missions
Microsoft Flight Simulator (2020)
Flight planning, systems mastery, routing
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.