Beams - Which is which?

Comparative engineering illustration of four numbered cantilever beams (1–4), all fixed at a wall on the left and carrying downward tip load F at the free right end. Three adjacent diagram groups show the same four cases from different viewpoints: at left, beams of the same illustrated profile with differing downward deflection; in the middle, cross-sections/profiles and beam depths vary, with dimension arrows and bending-stiffness relationships above; at right, simplified horizontal beams carry percentages 61%, 51%, 20%, and 0% from top to bottom with differing load-arrow positions. Caption boxes identify the comparison categories "Same profile / Different stiffness / Different weight", "Same weight / Different profile / Different stiffness", and "Same stiffness / Different weight / Different profile".