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 arcade FPS that scores you for killing enemies in the most creative ways possible.

Execution · Practiced Mastery
Neon top-down massacre where each floor is a one-mistake execution puzzle.
Bulletstorm leans Execution (Practiced Mastery); Hotline Miami leans Execution (Practiced Mastery).
Hotline Miami leans a little harder on execution, though the gap is small.
Bulletstorm
Leash, kick, and shot timing drive skillshot chains
Hotline Miami
One-hit-death rooms demand flawless fast inputs
Bulletstorm leans a little harder on reads, though the gap is small.
Bulletstorm
Enemies are scripted fodder for your combos
Hotline Miami
Enemies are dumb scripted reactors
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Bulletstorm
Arenas and spawns are fixed and learnable
Hotline Miami
Slight enemy behavior wobble between restarts
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Bulletstorm
Maximising skillshot score per arena is a solvable puzzle
Hotline Miami
Route planning and mask choice per floor
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.