The main difference here is that these AI bots are operating with an entirely different agenda. The ethics remain to be seen and the jury is out as to whether they will benefit the user they way the promise they will.
Also on a whole different scale and instead of supplementing the web content it’s devaluing it to a degree.
Yep, there’s a big difference in practice. If an AI could attribute and provide royalties then it may not be so different but that’s never going to happen. A big reason Bard exists is Google trying to ensure they stay profitable and relevant. They don’t care where the knowledge really comes from.