Both were entertaining, but the movie was more of a popcorn action flick while the book tried to explore the realities of war and a warrior led culture.

The Heinlein estate holders didn't like the movie so much, they have refused selling movie rights to any other book. So you won't see The Moon is a Harsh Mistress because of Starship Troopers.

I recall an authoritarian college professor in the book. When considered alongside Heinlein's other work, I suspect the text of the professor's lectures are meant to be examined critically.

Of course, Poe's Law says that someone will take any satire at face value. Or that I took as satire something not meant to be?

Yes, Knowing Better has done a great analysis on such

17:52 for the book

That depends a lot on who you ask. All the weird propaganda in the movie is not there, but also the way that the main character explains how his society functions is perhaps incomplete.

We don't see their society being racist (except against aliens) or sexist, we don't see them suppress free speech or labor rights, we don't see them worshipping some kind of Fuhrer either.

Personally, I think that war makes fascists of us all and that's what the book tried to convey.