Cumulative mass-fraction distributions of accreted material as a function of initial semi-major axis for Earth analogs (blue) and Mars analogs (red). Shaded regions indicate the adopted compositional reservoirs: EF (a < 0.9747 AU), EC (0.9747 ≤ a < 1.0674 AU), OC (1.0674 ≤ a < 2.0 AU), and CI (a ≥ 2.0 AU). Vertical black lines mark the boundaries between adjacent reservoirs. Earth analogs preferentially accrete inner-disk material (EF-EC), whereas Mars analogs show enhanced contributions from outer-disk material (OC-CI).