head to head
vs
Left 4 Dead 2vsTom Clancy's Rainbow Six: Rogue Spear
Left 4 Dead 2 leans Execution (Practiced Mastery); Tom Clancy's Rainbow Six: Rogue Spear leans Optimization (Practiced Mastery).
Left 4 Dead 2Tom Clancy's Rainbow Six: Rogue Spear
Axis by axis
Execution6 vs 6
Even - both lean on execution about the same.
Reads3 vs 4
Tom Clancy's Rainbow Six: Rogue Spear leans harder on reads: Multiplayer rewards predicting human entry points and timing
Variance5 vs 3
Left 4 Dead 2 leans harder on variance: AI Director randomizes spawns and items
Optimization6 vs 7
Tom Clancy's Rainbow Six: Rogue Spear leans harder on optimization: Pre-mission waypoint planning is half the game
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.