head to head
vs
Tom Clancy's Rainbow Six: Vegas 2vsWorms Forts: Under Siege
Tom Clancy's Rainbow Six: Vegas 2 leans Execution (Practiced Mastery); Worms Forts: Under Siege leans Execution (Practiced Mastery).
Tom Clancy's Rainbow Six: Vegas 2Worms Forts: Under Siege
Axis by axis
Execution7 vs 6
Tom Clancy's Rainbow Six: Vegas 2 leans harder on execution: Cover-based gunfights still punish poor aim
Reads3 vs 4
Worms Forts: Under Siege leans harder on reads: Human opponents to outguess on building and target priorities
Variance3 vs 3
Even - both lean on variance about the same.
Optimization6 vs 5
Tom Clancy's Rainbow Six: Vegas 2 leans harder on optimization: Room-clearing order and squad commands are solvable tactics
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.