The difference is that you can push a tab from one device to another. So if you're reading something on your phone, and push it to your laptop, it will automatically open in a new tab there once it syncs. It's good for when you're on the go, and want to remember to read something later on once you get back to your computer.
By the way, Firefox also has the feature you mention (view tabs that are open on devices).
Ah, I guess the benefit of "pushing" a tab shows in stateful applications or something, so it keeps the same "state" on the new device? Or, does it keep the same distance scrolled down the page so you can pick up where you were?
I'm confused because I open desktop session links from my mobile all the time and I'm curious if there's features I'm missing out on by pushing from one device to another, instead of syncing.
For example, if I open Chrome, I see the tabs open across all my other computers[1] and I usually just resume relevant tabs from there. It keeps me logged in, but sometimes reverts things like filters or sorting (on-page JS) unless it is part of the URL. It doesn't scroll me where I was in a page either, which would be nice.
By the way, Firefox also has the feature you mention (view tabs that are open on devices).