It' a question that is often heard: it is better to the Public Cloud or Private Cloud? We see, therefore, to find an answer that is valid regardless of the context.
To do a bit of clarity we start with the definition of some terms.
For Pubblic Cloud refers to the use of ICT physically present in the infrastructure of a cloud services provider, and for many users / customers.
Of course, the security policy of the Cloud Provider, will ensure the total separation and reliable data between different users / customers.