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

Execution · Practiced Mastery
Neon top-down massacre where each floor is a one-mistake execution puzzle.

Execution · Pure Mechanics
One-hit-kill room clearing where dive timing and aim decide everything.
Hotline Miami leans Execution (Practiced Mastery); The Hong Kong Massacre leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Hotline Miami
One-hit-death rooms demand flawless fast inputs
The Hong Kong Massacre
One-hit deaths make dive-and-shoot precision everything
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hotline Miami
Enemies are dumb scripted reactors
The Hong Kong Massacre
Enemies react on fixed triggers, never modelling you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Hotline Miami
Slight enemy behavior wobble between restarts
The Hong Kong Massacre
Enemy placements are scripted-but-unknown on first attempt
Hotline Miami leans a little harder on optimization, though the gap is small.
Hotline Miami
Route planning and mask choice per floor
The Hong Kong Massacre
Room-clearing order and slow-mo budgeting reward planning
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.