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 · Practiced Mastery
A driving sim testing smooth vehicle handling against timetables and traffic rules.

Execution · Practiced Mastery
A massive open-world sandbox built around grappling-hook and parachute chaos.
Bus Driver leans Optimization (Practiced Mastery); Just Cause 2 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.
Bus Driver
Smooth braking and lane discipline are the physical test
Just Cause 2
Grapple-parachute flow rewards handling skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Bus Driver
Traffic follows predictable scripted rules
Just Cause 2
Enemy AI never adapts
Just Cause 2 leans a little harder on variance, though the gap is small.
Bus Driver
Routes and conditions are set per scenario
Just Cause 2
Sandbox chaos varies moment to moment
Bus Driver leans a little harder on optimization, though the gap is small.
Bus Driver
Timetable adherence and rule-following decide the score
Just Cause 2
Chaos-point economy and settlement completion 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.