Campagnolo Nuovo Record components are very durable. They also retain a very high resale value, even when used. Having said that, the Superbe is very good too. The Shimano may be, depending on the model. From a performance standpoint it may even be better than the Campagnolo. But of you want admiring glances from the bicycle snobs, insteads of derisive snickers, you'd best keep the Campagnolo on the bicycle.
If you post the serial number, I can tell you the year. Someone is undoubtedly going to ask for pics, sooner or later, so you might as well post them now.