They are not the same. Rizzini's look like every other ugly Brescia built O/U out there, while the Inverness looks like a sleek Mckay Brown. Mechanically, they are very similar, but why should that surprise anyone? They are guns, and people have been copying good gun designs since gun design began. The Winchester M-70 is a copy of the German Mauser, yet we say the M-70 is as American as apple pie. Win Hester wasn't the only company to copy the design ejther... The Inverness name was owned by CSMC, not Rizzini. The name Inverness was slapped on a Rizzini gun and imported into the US. That's why there was confusion when CSMC began making their own Inverness, and why many people believed CSMC was using Rizzini actions, which they weren't.
Wrong. So ridiculously WRONG. The B. Rizzini round body is built on a action designed by Ivan Tanfoglio (of Ferlib fame). The round body Rizzini does NOT use the standard "Brescia" action used by many Italian makers. And just for the record, while the CSMC and Rizzini round body guns do have a rounded body, they are in no way nor do they even resemble a DMB. Not even close. If you have the opportunity (I do) to view and handle the DMB and the Rizzini together, you'll notice all the differences immediately.
There is no design genius at CSMC (they don't have a Ivan Tanfoglio or John Browning on the payroll).... Everything CSMC makes is a copy of someone else's product. That's a fact and the CSMC Inverness falls directly in line with their other products.