head to head
vs
Bullet Heaven 2vsDoom (1993)
Bullet Heaven 2 leans Execution (Pure Mechanics); Doom (1993) leans Execution (Pure Mechanics).
Bullet Heaven 2Doom (1993)
Axis by axis
Execution9 vs 8
Bullet Heaven 2 leans harder on execution: Dodging dense bullet patterns is the whole game
Reads0 vs 0
Even - both lean on reads about the same.
Variance2 vs 3
Doom (1993) leans harder on variance: Enemy placement is fixed but unknown on first run through levels
Optimization5 vs 5
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.