head to head
vs
Halo: ReachvsTom Clancy's Rainbow Six: Rogue Spear
Halo: Reach leans Execution (Practiced Mastery); Tom Clancy's Rainbow Six: Rogue Spear leans Optimization (Practiced Mastery).
Halo: ReachTom Clancy's Rainbow Six: Rogue Spear
Axis by axis
Execution7 vs 6
Halo: Reach leans harder on execution: DMR precision and armour-ability timing
Reads4 vs 4
Even - both lean on reads about the same.
Variance2 vs 3
Tom Clancy's Rainbow Six: Rogue Spear leans harder on variance: Terrorist placements shuffle, keeping plans honest
Optimization5 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.