head to head
vs
Resistance 2vsSpeedball
Resistance 2 leans Execution (Pure Mechanics); Speedball leans Execution (Pure Mechanics).
Resistance 2Speedball
Axis by axis
Execution7 vs 7
Even - both lean on execution about the same.
Reads4 vs 4
Even - both lean on reads about the same.
Variance1 vs 2
Speedball leans harder on variance: Warp tunnels and bounce domes add light chaos
Optimization4 vs 3
Resistance 2 leans harder on optimization: Exotic weapon choice and class co-op roles add planning
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.