The StruCTCopy() and structduplicate() functions are both used to create a copy of a structure in ColdFusion, which is a web development platform that supports getting over it dynamic web pages and applications. However, there are some differences between them, such as:

The StruCTCopy() function copies the top-level keys, values, and arrays in the structure by value, but copies nested structures by reference. It cannot copy complex data types, such as CFCs, XML objects, COM, CORBA, or JAVA objects.

The structduplicate() function returns a clone, also known as a getting over it deep copy, of a structure. It can copy any data type, including CFCs and XML objects.