head to head
Neither is simply harder - they are hard in different places. DOOM (2016) demands more optimization; Montaro : RE demands more variance.

Execution · Pure Mechanics
Push-forward arena FPS where movement and aim are the whole game.

Execution · Pure Mechanics
A comedic reflex platformer testing jump timing against fast obstacles.
DOOM (2016) leans Execution (Pure Mechanics); Montaro : RE 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.
DOOM (2016)
Aim, movement, glory-kill timing all peak.
Montaro : RE
Reflex jumping and timing carry this runner-platformer
DOOM (2016) leans a little harder on reads, though the gap is small.
DOOM (2016)
Demons scripted attack patterns.
Montaro : RE
No adaptive opponent in a solo arcade game
Montaro : RE leans clearly harder on variance.
DOOM (2016)
Minimal encounter randomness.
Montaro : RE
Some procedural obstacles add randomness
DOOM (2016) leans clearly harder on optimization.
DOOM (2016)
Rune and weapon mod picks meaningful.
Montaro : RE
Little to solve beyond reacting to obstacles
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.