AI just ingests and then spits back out what it reads on the internet, with some risk of it misunderstanding or misstating things along the way as a middleman. For the kind of searches you are doing it’s probably not awful, though I would still consider it inferior to just doing the search and reading the source material myself. I have noticed a high “distortion rate” using Presearch and reading its AI summaries for topics I am already familiar with; people doing searches on unfamiliar topics are going to be vulnerable to being misled if they get lazy and rely on the AI responses rather than reading source material themselves.
I did not check them, but I assume some, or all, may have Pay Walls.
In my opinion, Microsoft Bing (Search) has been as good as, or better than, Google, for the last several years.