head to head
Left 4 Dead asks more than Golf With Your Friends, and the gap is reads.

Execution · Twitch Chaos
A mini-golf party game where shot timing and adapting to absurd level hazards are the twin demands.

Execution · Twitch Chaos
Co-op zombie shooter whose AI Director reshuffles every run to keep teams honest.
Golf With Your Friends leans Execution (Twitch Chaos); Left 4 Dead leans Execution (Twitch Chaos).
Left 4 Dead leans a little harder on execution, though the gap is small.
Golf With Your Friends
Power gauge timing and aim precision determine shot outcomes
Left 4 Dead
Headshots, melee shoves, and special-infected reaction time
Left 4 Dead leans clearly harder on reads.
Golf With Your Friends
No adaptive opponent; race-to-hole party format
Left 4 Dead
Versus mode adds human ambush mindgames
Left 4 Dead leans a little harder on variance, though the gap is small.
Golf With Your Friends
Trick holes and environmental hazards add chaotic hidden elements
Left 4 Dead
AI Director randomizes hordes, items, and specials
Left 4 Dead leans a little harder on optimization, though the gap is small.
Golf With Your Friends
Shot selection and route planning through obstacle courses are learnable
Left 4 Dead
Team spacing, route choice, and resource discipline
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.