head to head
vs
Magic: The Gathering ArenavsMahjong Soul
Magic: The Gathering Arena leans Optimization (Grand Arena); Mahjong Soul leans Variance (Systems & Chaos).
Magic: The Gathering ArenaMahjong Soul
Axis by axis
Execution1 vs 0
Magic: The Gathering Arena leans harder on execution: Pure clicks, no mechanical skill
Reads7 vs 5
Magic: The Gathering Arena leans harder on reads: Bluffing instants and combat tricks against humans
Variance7 vs 8
Mahjong Soul leans harder on variance: Wall draws and concealed hands dominate single games
Optimization8 vs 8
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.