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
An early top-down rampage shooter with simple execution demands.

Execution · Practiced Mastery
Cinematic third-person shooter where time-manipulation powers drive combat and story.
Postal leans Execution (Practiced Mastery); Quantum Break leans Execution (Practiced Mastery).
Quantum Break leans a little harder on execution, though the gap is small.
Postal
top-down shooting and movement
Quantum Break
Aimbot trivialises the time-power shooting encounters
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Postal
enemies use fixed aggressive scripts
Quantum Break
No adaptive opposition; enemies follow scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Postal
enemy spawn and pathing randomness
Quantum Break
First-run encounter surprises fade on replay
Quantum Break leans a little harder on optimization, though the gap is small.
Postal
weapon choice and route clearing
Quantum Break
Power upgrades and encounter solutions are quickly solved
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.