Thank you for the information and your question. First, I want to congratulate you on your plans. I am a U.S./Italian dual citizen who not only spent most of the summers of my youth in Italy, Naples in particular, but am also, in the near future going to be looking to buy property in Italy.
There are definitely some real differences in the process, and it can get expensive to fix problems. I would say that first and foremost it is important that you trust the people who are handling this for you. You will ultimately need a Notaio that you trust to handle the contractual portion of your transaction. In addition to the main issues of ensuring that you are getting what you think you are, if this property is an already existing property, there can be issues of rights of first refusal and inheritance issues. I would highly recommend that you read in their entirety the information at the following two links. The third link is to the U.S Embassy's recommendation for a Neopolitan Notaio.
Please feel free to ask follow up questions if you have them. If not, if you could take a moment to leave a positive rating in the box above, I will receive credit for assisting you. Thank you