Violin plot showing the distribution of stellar mass arm/interarm contrasts in logarithmic scale for all radial bins across the PHANGS targets, considering an extended field of view (all Σ_⋆ measurements across spiral arms, not limited to the PHANGS–ALMA field of view). The violin plots are split into grand-design galaxies (right) and the rest of spirals (left). The long dashed line shows the median of the distribution in each case, while the short dashed lines display the 25^th and 75^th percentiles of the data, with labels indicating for reference the corresponding values on a linear scale.