My dad used to tell me that it was easy to carve a duck out of a block of wood. All you needed to do was remove everything that didn't look like a duck and - presto - you have a duck! That's similar to the statement made by one of the design engineers at Carillo when I asked about the H beam design. They basically started with a good size blank and machined away every part that wasn't necessary for rod strength. Although an H beam starts out as a forging blank similar to an I beam rod, an I beam has it's shape right out of the forge with finish machining consisting of cleaning up beams, etc. On the other hand, an H beam has the cavities machined into the sides of the beams rather than being forged in that shape. I hope this makes some sense. That's one of the reasons I think a good forged I beam is stronger - all of the material is forged into the final shape and contributes to it's strength with grain shape and flow with none of the "grain" structure cut away which seems like it has to weaken the rod. Along those lines, if forged out of the same material, a true forged I beam should also be stronger than a machined billet piece. Straighten me out as needed, this is just the way it's been explained to me, or at least that was my interpretation of what some folks have tried to tell me.
My .02, generally recognized as being worth a bit less than half of that.