The difference is that I will retain what I drew out from the dictionary the next time. If people use Ai this way for writing, great! What many of the "enhanced-by-ai" arguments sound like is that this will be an indefinite outsourcing.

Use them to get better, like how reading good writing directly (not summarized) will also make you a much better writer. Learn from the before and after so next time there isn't a need to reach for Ai.