head to head
vs
Battlefield 4vsTribes 2
Battlefield 4 leans Execution (Competitive PvP); Tribes 2 leans Execution (Pure Mechanics).
Battlefield 4Tribes 2
Axis by axis
Execution7 vs 9
Tribes 2 leans harder on execution: Skiing physics and disc-jumping aim define the skill ceiling
Reads5 vs 6
Tribes 2 leans harder on reads: Team PvP with adaptive human flag runners
Variance3 vs 2
Battlefield 4 leans harder on variance: Map-altering events and spawns inject noise
Optimization5 vs 5
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.