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 · Pure Mechanics
A test of fast, precise shooting and map navigation against scripted but relentless enemies.

Execution · Pure Mechanics
A bullet-hell shmup testing precise dodging and score-chasing pattern mastery.
Doom (1993) leans Execution (Pure Mechanics); Ghost Blade HD leans Execution (Pure Mechanics).
Ghost Blade HD leans a little harder on execution, though the gap is small.
Doom (1993)
Precise movement and shooting against relentless enemy pressure
Ghost Blade HD
Dodging bullet-hell waves and aiming is the lead
Ghost Blade HD leans a little harder on reads, though the gap is small.
Doom (1993)
Enemies follow scripted patrol and attack patterns, not adaptive
Ghost Blade HD
Enemies follow scripted bullet patterns, not adapting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Doom (1993)
Enemy placement is fixed but unknown on first run through levels
Ghost Blade HD
Enemy waves fixed, minor spawn variation
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Doom (1993)
Level routing and resource management determine survival efficiency
Ghost Blade HD
Scoring chains and pattern learning improve runs
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.