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 physics sandbox whose actual skill test is whatever board game you load into it.

Reads · Bluff & Deduction
A bluff-heavy pack where predicting what your friends will write is the whole game.
Tabletop Simulator leans Reads (Bluff & Deduction); The Jackbox Party Pack 4 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.
Tabletop Simulator
Fiddly physics manipulation, never a skill ceiling
The Jackbox Party Pack 4
Tapping a phone screen.
The Jackbox Party Pack 4 leans a little harder on reads, though the gap is small.
Tabletop Simulator
Depends entirely on the tabletop game played with humans
The Jackbox Party Pack 4
Fibbage 3 and Survive the Internet reward modelling friends.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Tabletop Simulator
Dice and shuffled decks supply whatever randomness the game has
The Jackbox Party Pack 4
Random prompts shuffle every session.
Tabletop Simulator leans a little harder on optimization, though the gap is small.
Tabletop Simulator
Strategy lives in the hosted game, not the simulator
The Jackbox Party Pack 4
Marginal trivia and wording strategy.
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.