From what i was explained, the techniques are different. corima is hollow with foam filled core, the hyperon is all carbon
but what do i know - im just trying to figure this out.
could it be that before 03 corima did not make the rim for campy, and he was refering to that? whatever it is, he says the previous rim (if their was a previous rim) was better, or which ever has the carbon core instead of foam. anyone care to elaborate on this, and prove otherwise.
Actually Corima make the core (it's structural foam) and basically build the carbon skin around it. It was explained to me once that if they could anchor the spokes in the foam, they wouldn't need the carbon...it's not just a filler to deaden the noise or anything.
Before '03 the Bora carbon rims (with aluminum braking surface) were not made by Corima (the original '90's Bora was a Corima rim). The original Hyperon is not a Corima product as far as I can tell. But they are heavy, 1240gms according to my scales, when you can get Winium/Spada combos at around 1,000gms.