Echoing what Wayalife said with a little tweak.
I'm sure that given the reputations of these two company's this isn't the case, but.
Billet does not always equate to a stronger product as you can have a billet part made from weaker material. I'm sure this isn't the case with curry being such a reputable company. Likewise with the proper high quality material, with good cast-ability a forged part can be stronger than a lesser quality billet.
The true deciding factor is what grade aluminum was used on each. If both were made from equal grade than the billet is stronger.
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