I could do an in-depth analysis, but I'm sure I'd bore you with it.
Regarding the 1997 anime, I can say that the one from 1997 is beautiful. It's excellent in animation, in the characters' voices, and in the Golden Age arc, it serves as an introduction for those who wanted to read the manga. It was done on purpose so that, since the manga was still ongoing, the ending would be an invitation to do so. I haven't seen the movies, but it's practically the same as the first anime, only with better animation than the series from the previous decade.
About the manga I can only say that it is a masterpiece of art, the golden age as they said is the best, I think that many complain about the scenes of violence like the dogs and the lost children, but for me it reflects the crudeness that Miura wants to convey to his readers, being that in general the manga is a tragedy for Guts and for almost all the characters.
What I regret most is that the author died, that he dragged out the manga for so long between hiatuses, and the fact that the story fell into a certain redundancy. However, those would be the only flaws, since the ending will now be somewhat artificial, despite the many indications or ideas he gave his assistants.