head to head
Left 4 Dead asks more than Temple Run 2, and the gap is reads.

Execution · Twitch Chaos
Co-op zombie shooter whose AI Director reshuffles every run to keep teams honest.

Execution · Twitch Chaos
Sustained reaction-swiping against procedurally shuffled obstacle segments.
Left 4 Dead leans Execution (Twitch Chaos); Temple Run 2 leans Execution (Twitch Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Left 4 Dead
Headshots, melee shoves, and special-infected reaction time
Temple Run 2
Split-second swipes at rising speed are the whole game
Left 4 Dead leans clearly harder on reads.
Left 4 Dead
Versus mode adds human ambush mindgames
Temple Run 2
No opponent; the track does not adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Left 4 Dead
AI Director randomizes hordes, items, and specials
Temple Run 2
Procedural track segments keep each run unpredictable
Left 4 Dead leans clearly harder on optimization.
Left 4 Dead
Team spacing, route choice, and resource discipline
Temple Run 2
Powerup upgrades and objectives add a thin meta layer
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.