head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, 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
The Quiplash 3 pack, where winning means predicting what makes this exact room laugh.
The Jackbox Party Pack 4 leans Reads (Bluff & Deduction); The Jackbox Party Pack 7 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 7
Typing and tapping only.
The Jackbox Party Pack 7 leans a little harder on reads, though the gap is small.
The Jackbox Party Pack 4
Fibbage 3 and Survive the Internet reward modelling friends.
The Jackbox Party Pack 7
Quiplash 3 and Talking Points are pure crowd-reading.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
The Jackbox Party Pack 4
Random prompts shuffle every session.
The Jackbox Party Pack 7
Prompt draws randomise every round.
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 7
Little to solve beyond wording instincts.
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.