Comparison of crater depth differences (ΔDepth = Depth_Rubanenko – Depth_Wang) as a function of latitude for the (a) north and (b) south polar regions for common craters in both catalogs. Filled circles show individual crater measurements, while solid black lines denote least-squares linear fits to the data. The fitted intercept represents the depth difference at 60° latitudes, and the slope quantifies the poleward variation in ΔDepth toward the poles. Φ in the linear equation represents latitude. The horizontal dashed line marks ΔDepth = 0 m.