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 vertical bullet-hell shmup testing precise dodging through dense scripted patterns.
Doom (1993) leans Execution (Pure Mechanics); eXceed 2nd: Vampire REX leans Execution (Pure Mechanics).
eXceed 2nd: Vampire REX leans a little harder on execution, though the gap is small.
Doom (1993)
Precise movement and shooting against relentless enemy pressure
eXceed 2nd: Vampire REX
Dodging dense bullet patterns at speed is the entire test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Doom (1993)
Enemies follow scripted patrol and attack patterns, not adaptive
eXceed 2nd: Vampire REX
Solo - enemies fire fixed scripted patterns, no adaptation
Doom (1993) leans a little harder on variance, though the gap is small.
Doom (1993)
Enemy placement is fixed but unknown on first run through levels
eXceed 2nd: Vampire REX
Patterns are deterministic and memorisable, little true randomness
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
eXceed 2nd: Vampire REX
Polarity routing and scoring systems reward learned play
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.