head to head
Quake III ArenavsSkullgirls: 2nd Encore
Quake III Arena leans Execution (Pure Mechanics); Skullgirls: 2nd Encore leans Execution (Competitive PvP).
Quake III ArenaSkullgirls: 2nd Encore
Axis by axis
Execution9 vs 9
Even - both lean on execution about the same.
Reads6 vs 7
Skullgirls: 2nd Encore leans harder on reads: Mixups and resets only work by out-guessing a human
Variance2 vs 1
Quake III Arena leans harder on variance: Spawn locations have mild randomness but are quickly mapped
Optimization5 vs 5
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.

