head to head
Garry's Mod asks more than Just Die Already, and the gap is reads.

Reads · Light / Casual
Source-engine sandbox whose community modes range from building to social deduction.

Execution · Light / Casual
A ragdoll sandbox that tests tolerance for chaos more than any skill.
Garry's Mod leans Reads (Light / Casual); Just Die Already leans Execution (Light / Casual).
Just Die Already leans a little harder on execution, though the gap is small.
Garry's Mod
Varies by mode; base sandbox is undemanding
Just Die Already
Wrangling ragdoll old folks takes loose physical fiddling
Garry's Mod leans clearly harder on reads.
Garry's Mod
Social deduction modes like TTT involve humans
Just Die Already
Other players add only incidental chaos
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Garry's Mod
Hidden roles and player chaos in popular modes
Just Die Already
Ragdoll physics makes outcomes pleasantly unpredictable
Garry's Mod leans a little harder on optimization, though the gap is small.
Garry's Mod
Contraption building rewards systems knowledge
Just Die Already
Challenge checklists have simple findable solutions
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.