head to head
vs
Resistance 2vsShell Shockers
Resistance 2 leans Execution (Pure Mechanics); Shell Shockers leans Execution (Pure Mechanics).
Resistance 2Shell Shockers
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
Shell Shockers leans harder on variance: Spawn and weapon-encounter luck stay minor.
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.