head to head
vs
Indy 500vsRace Driver: Grid
Indy 500 leans Execution (Pure Mechanics); Race Driver: Grid leans Execution (Practiced Mastery).
Indy 500Race Driver: Grid
Axis by axis
Execution6 vs 7
Race Driver: Grid leans harder on execution: Aggressive wheel-to-wheel car control is the core demand
Reads3 vs 2
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.
Optimization3 vs 5
Race Driver: Grid leans harder on optimization: Braking points, lines and flashback management are learnable
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.