The strength of a rod in tension is mostly determined by it’s cross sectional area, not the shape. All else being equal, heavier rods are stronger in tension. Resistance to bending force is more strongly influenced by shape. For equal weight, the H beam rod will handle more bending force. The V8 hot rodders have been using H beam rods for years as upgrades.
For much more about rod design see
http://www.grapeaperacing.com/GrapeA...ectingrods.pdf