head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Reads · Bluff & Deduction
A bluff-heavy pack where predicting what your friends will write is the whole game.

Reads · Bluff & Deduction
A party-game collection built on reading friends and comedic bluffing.
The Jackbox Party Pack 4 leans Reads (Bluff & Deduction); The Jackbox Party Pack 9 leans Reads (Bluff & Deduction).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
The Jackbox Party Pack 4
Tapping a phone screen.
The Jackbox Party Pack 9
minor typing/drawing speed in some games
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
The Jackbox Party Pack 4
Fibbage 3 and Survive the Internet reward modelling friends.
The Jackbox Party Pack 9
reading fellow players' humor and bluffs
The Jackbox Party Pack 4 leans a little harder on variance, though the gap is small.
The Jackbox Party Pack 4
Random prompts shuffle every session.
The Jackbox Party Pack 9
prompt randomness affects rounds
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The Jackbox Party Pack 4
Marginal trivia and wording strategy.
The Jackbox Party Pack 9
minor strategic answer choices
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.