head to head
vs
Mount Your FriendsvsRace Driver: Grid
Mount Your Friends leans Execution (Pure Mechanics); Race Driver: Grid leans Execution (Practiced Mastery).
Mount Your FriendsRace Driver: Grid
Axis by axis
Execution8 vs 7
Mount Your Friends leans harder on execution: QWOP-like limb control under a timer is the entire challenge
Reads2 vs 2
Even - both lean on reads about the same.
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.