An assistant bolted onto one tool can only answer that tool's questions. Q sits on the same record every module writes to, which is why it can tell you that this quarter's margin problem started as a scope change on a project that came from a deal sold in March.
The third one is the difference. Asking is a chat window; watching is an operator who notices the thing you would have caught if you had the time.
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The list matters more than the capability list, because this is the part your clients and your IT reviewer will ask about.