Same as Figure 2, but for a mass ratio of q₂ = 0.6. Compared to the q₂ = 0.9 case, the overall distribution of mass transfer types remains similar, with Case C transfer still confined to M₁ ≲ 20 M_⊙. These results indicate that the overall landscape of mass transfer is relatively insensitive to the mass ratio. The main difference is that a smaller q₂ reduces the overall fraction of interacting binaries while promoting unstable mass transfer and increasing the fraction of CEE.