Yes, they are jointed and hollow (makes the ring lighter and more comfortable).
The Bvlgari B. Zero line, the ring, is a sort of a mechanism as well, it almost works like a spring so they will teach you how to put it on and take it off appropriately so that you don't stretch the ring out over time.
Something else to think about is because the JUC ring has a curved surface, it's less likely to
see the scratches.
While the Viper pieces have all those flat sides that will also get scratches, but the scratches may look more noticeable or obvious.
But it's a matter of personal preference and whether scratches bother you or not.
Many of us on TPF have come to term with scratches on our fine jewelry and we're just happy to wear them and see them age with us as we age haha.
When I go home I'll take photos for you to see and compare.