head to head
vs
Garry's ModvsTabletop Simulator
Garry's Mod leans Reads (Light / Casual); Tabletop Simulator leans Reads (Bluff & Deduction).
Garry's ModTabletop Simulator
Axis by axis
Execution2 vs 1
Garry's Mod leans harder on execution: Varies by mode; base sandbox is undemanding
Reads3 vs 4
Tabletop Simulator leans harder on reads: Depends entirely on the tabletop game played with humans
Variance3 vs 4
Tabletop Simulator leans harder on variance: Dice and shuffled decks supply whatever randomness the game has
Optimization3 vs 3
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.