I would say it is more like the Culture novels than the Dune ones. I liked it just as much as the Culture stories, had that same kind of solid character development that Mr Banks was so good at. Culture books (excluding one of my favourites of course - Inversions) had more tech than these books although the ships in both series play big parts.
Justice of Torren is actually a troop carrier, but I figured it would need a few guns kicking about
Read the books - they are great.
If you listen to audiobooks - I would recommend listening to these that way as the voice acting by the narrator is excellent.