head to head
Neither is simply harder - they are hard in different places. The Jackbox Party Pack 3 demands more reads; The Jackbox Survey Scramble demands more variance.

Reads · Bluff & Deduction
The pack with Trivia Murder Party and Fakin' It, built on out-guessing the room.

Variance · Bluff & Deduction
A party game testing guesses about how a crowd answered survey questions.
The Jackbox Party Pack 3 leans Reads (Bluff & Deduction); The Jackbox Survey Scramble leans Variance (Bluff & Deduction).
The Jackbox Survey Scramble leans a little harder on execution, though the gap is small.
The Jackbox Party Pack 3
Phones-as-controllers, near-zero dexterity.
The Jackbox Survey Scramble
Quick answer entry, minimal dexterity
The Jackbox Party Pack 3 leans clearly harder on reads.
The Jackbox Party Pack 3
Trivia Murder Party and Fakin' It reward reading the room.
The Jackbox Survey Scramble
Guessing what the crowd answered involves modelling people
The Jackbox Survey Scramble leans clearly harder on variance.
The Jackbox Party Pack 3
Random prompts and question draws.
The Jackbox Survey Scramble
Hidden survey results drive the guessing each round
The Jackbox Survey Scramble leans a little harder on optimization, though the gap is small.
The Jackbox Party Pack 3
Light trivia and betting math.
The Jackbox Survey Scramble
Knowing common-answer patterns gives a small edge
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.