biggest diff imo is where u spend your time. old tools = maintaining the library. ai-first tools = reviewing drafts. that's the whole shift
The real split is architecture. Legacy tools like Qvidian, Loopio and Responsive are built around a content library you maintain, with AI added later to help draft. Inventive AI is built AI-first, so instead of curating a Q&A library it connects to where your content already lives (SharePoint, Drive, Confluence) and drafts from that, with a citation and confidence score on each answer. So you spend time approving instead of coordinating and copy-pasting.
Also the newer ones dont make u migrate everything first. that alone saved us weeks ngl