Any key differences between multi page and multi-tab apps

Are there any fundamental differences between how a multi page app and multi-tab app operate? For example, is it just an aesthetic difference or are there more hidden pros and cons to each?

Perhaps one preserves certain states better than the other?

I’m interested in other people’s answer to this question too.

Personally, I am building a multi-page app that allows me to pass information between pages via the page url. So I can have multiple links on page 1 that will link to different versions of page 2.