head to head
Neither is simply harder - they are hard in different places. Spy vs Spy demands more execution; Town of Salem demands more reads.

Reads · Pure Mind Games
A split-screen trap duel testing prediction of where your human rival hid the bombs.

Reads · Pure Mind Games
A text-based social deduction game that distils bluffing, counter-deduction, and role optimisation against human opponents.
Spy vs Spy leans Reads (Pure Mind Games); Town of Salem leans Reads (Pure Mind Games).
Spy vs Spy leans clearly harder on execution.
Spy vs Spy
Simple movement and item fiddling under time pressure
Town of Salem
Text voting and clicking have no physical demand
Town of Salem leans clearly harder on reads.
Spy vs Spy
Guessing where the rival spy laid traps is the core duel
Town of Salem
Modelling human bluffers who adapt to your deductions is the game
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Spy vs Spy
Item locations are hidden information each round
Town of Salem
Role assignments and night-action targets vary every game
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Spy vs Spy
Trap-and-counter knowledge forms a learnable layer
Town of Salem
Role knowledge and voting strategy are learnable optimal policies
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.