head to head
Roblox asks more than Tabletop Simulator, and the gap is execution.

Execution · Practiced Mastery
A platform of millions of user-created multiplayer games spanning every genre, played mostly by younger audiences.

Reads · Bluff & Deduction
A physics sandbox whose actual skill test is whatever board game you load into it.
Roblox leans Execution (Practiced Mastery); Tabletop Simulator leans Reads (Bluff & Deduction).
Roblox leans clearly harder on execution.
Roblox
Many popular experiences are obby/PvP tests of hands
Tabletop Simulator
Fiddly physics manipulation, never a skill ceiling
Tabletop Simulator leans a little harder on reads, though the gap is small.
Roblox
Multiplayer experiences pit you against other kids' minds
Tabletop Simulator
Depends entirely on the tabletop game played with humans
Tabletop Simulator leans a little harder on variance, though the gap is small.
Roblox
User-generated content means constant unknown systems
Tabletop Simulator
Dice and shuffled decks supply whatever randomness the game has
Roblox leans a little harder on optimization, though the gap is small.
Roblox
Grind economies and trading reward system mastery
Tabletop Simulator
Strategy lives in the hosted game, not the simulator
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.