head to head
vs
Virtua Tennis 3vsWii Sports
Virtua Tennis 3 leans Execution (Pure Mechanics); Wii Sports leans Execution (Pure Mechanics).
Virtua Tennis 3Wii Sports
Axis by axis
Execution7 vs 6
Virtua Tennis 3 leans harder on execution: Shot timing and court positioning decide every rally
Reads4 vs 2
Virtua Tennis 3 leans harder on reads: Human opponents' placement tendencies can be exploited
Variance1 vs 2
Wii Sports leans harder on variance: Minor physics wobble and CPU behaviour randomness
Optimization3 vs 3
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.