Mass ratio as a function of time for different α-viscosities and different period ratios. The darker the line, the farther away the planets are located from each other. The separation between the planets has a small impact on the range of their mass ratio, meaning that planets that start accreting at the same time will have similar masses. The behavior of the mass ratio evolution is not impacted by the planet separation: at all viscosities the mass ratio flips are due to the same reasons described in Fig. 3. The exception is for the 2:1 period ratio at high viscosity (right panel): here the planets are close enough and the viscosity is sufficiently high to maintain a significant flow toward the inner disk through the gaps, preventing the inner planet from being starved. This results in an additional mass ratio flip, ⦷, similar to the high viscosity single-planet case of Fig. 6.