head to head
Spy vs Spy asks more than The Jackbox Party Pack 3, and the gap is execution.

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

Reads · Bluff & Deduction
The pack with Trivia Murder Party and Fakin' It, built on out-guessing the room.
Spy vs Spy leans Reads (Pure Mind Games); The Jackbox Party Pack 3 leans Reads (Bluff & Deduction).
Spy vs Spy leans clearly harder on execution.
Spy vs Spy
Simple movement and item fiddling under time pressure
The Jackbox Party Pack 3
Phones-as-controllers, near-zero dexterity.
Spy vs Spy leans a little harder on reads, though the gap is small.
Spy vs Spy
Guessing where the rival spy laid traps is the core duel
The Jackbox Party Pack 3
Trivia Murder Party and Fakin' It reward reading the room.
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
The Jackbox Party Pack 3
Random prompts and question draws.
Spy vs Spy leans clearly harder on optimization.
Spy vs Spy
Trap-and-counter knowledge forms a learnable layer
The Jackbox Party Pack 3
Light trivia and betting math.
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.