head to head
vs
Forza Horizon 2vsIndy 500
Forza Horizon 2 leans Execution (Pure Mechanics); Indy 500 leans Execution (Pure Mechanics).
Forza Horizon 2Indy 500
Axis by axis
Execution7 vs 6
Forza Horizon 2 leans harder on execution: Racing lines, braking points and car control lead everything
Reads1 vs 3
Indy 500 leans harder on reads: Head-to-head races reward anticipating the rival's line
Variance1 vs 1
Even - both lean on variance about the same.
Optimization4 vs 3
Forza Horizon 2 leans harder on optimization: Car tuning and route knowledge reward preparation
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.