Migration runs between two server types different architecture and content formatting. If content extracted from one server will be literally put into another server, it will yield a garbage. Enterprise Bridge semantically extracts contents of source pages and converts it into semantically correct content suitable for target server.
You will get 100% native isolated SharePoint site reproducing your Confluence original. Due to deep semantic transformation of content it will not be even possible to determine that the content was taken from Confluence.
