They both look very close in terms of pixel widths, though the Motif screenshot is much higher resolution so there they actually look thinner to me. The window

They both look very close in terms of pixel widths, though the Motif screenshot is much higher resolution so there they actually look thinner to me. The window borders are 5px, vs. Motif's 6px (in your screenshot). The Motif button borders are actually thinner (2px vs. 3px). The Motif frames around lists are thicker (2px vs. 1px).