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

Reads · Pure Mind Games
A two-button parody fighter that strips fighting games down to pure one-hit-kill spacing reads.

Reads · Bluff & Deduction
The pack with Trivia Murder Party and Fakin' It, built on out-guessing the room.
Divekick leans Reads (Pure Mind Games); The Jackbox Party Pack 3 leans Reads (Bluff & Deduction).
Divekick leans a little harder on execution, though the gap is small.
Divekick
Two buttons, one-hit kills; almost no physical ceiling.
The Jackbox Party Pack 3
Phones-as-controllers, near-zero dexterity.
Divekick leans clearly harder on reads.
Divekick
Pure spacing yomi against an adapting human is the entire game.
The Jackbox Party Pack 3
Trivia Murder Party and Fakin' It reward reading the room.
The Jackbox Party Pack 3 leans clearly harder on variance.
Divekick
Fully deterministic.
The Jackbox Party Pack 3
Random prompts and question draws.
Divekick leans a little harder on optimization, though the gap is small.
Divekick
Character angles and gem choices are quickly mapped.
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.