head to head
vs
Forza Motorsport 7vsiRacing
Forza Motorsport 7 leans Execution (Practiced Mastery); iRacing leans Execution (Practiced Mastery).
Forza Motorsport 7iRacing
Axis by axis
Execution8 vs 9
iRacing leans harder on execution: Brutally precise wheel inputs required
Reads2 vs 4
iRacing leans harder on reads: Serious wheel-to-wheel racing vs humans
Variance2 vs 2
Even - both lean on variance about the same.
Optimization6 vs 7
iRacing leans harder on optimization: Setup, strategy, iRating progression
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.