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

Execution · Pure Mechanics
A reflex endless-hopper dodging randomized traffic for distance.

Execution · Pure Mechanics
Push-forward arena FPS where movement and aim are the whole game.
Disney Crossy Road leans Execution (Pure Mechanics); DOOM (2016) leans Execution (Pure Mechanics).
DOOM (2016) leans a little harder on execution, though the gap is small.
Disney Crossy Road
Precise tap timing to dodge traffic decides survival
DOOM (2016)
Aim, movement, glory-kill timing all peak.
DOOM (2016) leans a little harder on reads, though the gap is small.
Disney Crossy Road
Solo endless runner, no opponent to predict
DOOM (2016)
Demons scripted attack patterns.
Disney Crossy Road leans clearly harder on variance.
Disney Crossy Road
Traffic and obstacle spawns are randomized hazards
DOOM (2016)
Minimal encounter randomness.
DOOM (2016) leans clearly harder on optimization.
Disney Crossy Road
Pattern recognition of lane timing improves runs slightly
DOOM (2016)
Rune and weapon mod picks meaningful.
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.