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

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

Execution · Pure Mechanics
Reaction-speed platform racing where shifting colours keep redrawing the level under you.
DOOM (2016) leans Execution (Pure Mechanics); Runbow leans Execution (Pure Mechanics).
DOOM (2016) leans a little harder on execution, though the gap is small.
DOOM (2016)
Aim, movement, glory-kill timing all peak.
Runbow
Fast platform racing through vanishing platforms is pure reaction
Runbow leans clearly harder on reads.
DOOM (2016)
Demons scripted attack patterns.
Runbow
Light jostling with human racers, but little deep prediction
Runbow leans clearly harder on variance.
DOOM (2016)
Minimal encounter randomness.
Runbow
Colour swaps and party chaos randomise each race
DOOM (2016) leans clearly harder on optimization.
DOOM (2016)
Rune and weapon mod picks meaningful.
Runbow
Minimal systems - momentum tricks and level memory only
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.