Short answer
XML supports attributes, namespaces, mixed content, and document-oriented structures; JSON favors compact object and array data.
What to check
Review schema needs, interoperability, readability, and payload size. Validate well-formed markup, namespaces, character encoding, attributes, repeated nodes, and data types after conversion.
Using xml.now
Use the XML TO JSON converter, keep the source, and inspect the downloaded result before sharing it.