Well, I rarely believe anything from a "reliable source". If they are so reliable, say your name.
Next, Ritchie, above all else, knows marketing, sales and business in general. If he thought it was a good design, he wouldn't let it go.
Also, if the core was too expensive to make, why would Brunswick buy it? Out of the goodness of their hearts? Don't think so, they are publicly traded, the only goodness they have is what the BoD tells them.
Finally,
Diamond Core = 4 sides, pointed top and bottom
Torsion = 3 sides, rounded top and bottom
It's a stretch by anyone's imagination.
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What are you gonna do? Beat me with your Jesus stick?