head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Pure Mechanics
A fast reflex platformer about swinging through hazardous environments precisely.

Execution · Pure Mechanics
Push-forward arena FPS where movement and aim are the whole game.
Alien Spidy leans Execution (Pure Mechanics); DOOM (2016) 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.
Alien Spidy
Quick swinging and precise reflexes define every level
DOOM (2016)
Aim, movement, glory-kill timing all peak.
DOOM (2016) leans a little harder on reads, though the gap is small.
Alien Spidy
Solo platformer with no adaptive opponent
DOOM (2016)
Demons scripted attack patterns.
Alien Spidy leans a little harder on variance, though the gap is small.
Alien Spidy
Hazards are fixed and learnable
DOOM (2016)
Minimal encounter randomness.
DOOM (2016) leans a little harder on optimization, though the gap is small.
Alien Spidy
Optimal pathing speeds collection runs
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.