head to head
TimeSplitters asks more than DOOM (2016), and the gap is reads.

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

Execution · Pure Mechanics
A fast arcade FPS whose skill test is twitch aim plus couch-rival prediction.
DOOM (2016) leans Execution (Pure Mechanics); TimeSplitters 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.
TimeSplitters
Fast arcade gunplay rewards twitch aim
TimeSplitters leans clearly harder on reads.
DOOM (2016)
Demons scripted attack patterns.
TimeSplitters
Local multiplayer adds human guessing; bots do not adapt
TimeSplitters leans a little harder on variance, though the gap is small.
DOOM (2016)
Minimal encounter randomness.
TimeSplitters
Spawn and pickup timing add mild uncertainty
DOOM (2016) leans a little harder on optimization, though the gap is small.
DOOM (2016)
Rune and weapon mod picks meaningful.
TimeSplitters
Challenge times and map control are learnable
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.