As you can probably see by the pictures, I don't even own the manga in full! That's because I started collecting the shinsoban edition in my language only recently. I stopped collecting manga a long time ago due to a dust and silverfish combo of problems and I'd never re-read them anyway, but slam dunk is actually something I find myself reading and analyzing quite often. Also, I really just love Inoue's art and it got a bit tiring to only look at the chapters featured in the shonen jump special. Anyway, the shinsoban edition is pretty much the same in every country, features Inoue's newer illustrations in full cover and they're all very pretty.
Slam dunk's popular here in Italy so you can find it pretty much in any library, but because of that you might not find certain volumes. Apparently volume 19 is considered hard to find by some, and I'm glad I own it. I don't blame anyone for making it hard to get though, its cover features such a pretty picture of Rukawa.
This is a special volume of shonen jump released during the movie's screenings and promos, which basically serves as a collection or 'best of slam dunk'. It shows the pages as they originally appeared in shonen jump while it was being serialized in 90-96. It's usually my first resource whenever I want to look at Inoue's art up close and detailed (also the pages are in different colors, which idk if I'm a fan of). I've never put hands on a regular shonen jump tome other than this one so I don't know if this is just part of their usual printing features, but it's printed on this kinda poor-ish quality, newspaper-like paper, but I can probably imagine why they'd go for something like that. Still, for such a special release I would have expected something a bit more high quality and, other than that, more full color pages! Something I cannot find for the life of me, is scans of slam dunk's colored pages when they appeared on shonen jump. I know the kanzenban edition does have them (which is one of the reasons why I want it so bad!! it expensive though) but it's a shame we literally only get two in this tome.
I got this in a "package deal" with a figure, another artbook and a 'thank you for coming to the movie' card for my birthday. It's an artbook containing lots of info, interviews, production shots and early concepts of the 2022 movie 'The First Slam Dunk'. I absolutely loved that movie when it came out here, shame I only got to see it once, and the only screenshots and videos that aren't the trailers are still taken by people who went to see the movie, so anything that helps me recall that experience is a treasure to me. It also has a high quality print of Inoue's short story 'Pierce' at the end of the book! I'm sure you can already find scans online for it though, since it's been out for a while. My favorite thing in this volume though is the concept sketch for this popular screenshot of the movie, featuring Rukawa jumping high. I think the sketch is so much better compared to the final cgi, Inoue's stylistic choices are more evident and Rukawa's facial features look softer and delicate. This book also comes with a poster of the movie's artwork that you can cut out.
This also came in the bundle I bought. This one contains more interviews with the staff and screenshots from the movie, the key feature being these full page cgi artwork of the backgrounds and locations. I've heard that some people who didn't like the movie complained about its colors being too washed out but I much prefer them to other eyestraining big dollar japanese anime movies (cough cough makoto shinkai cough cough)