I just watched the entire 90s version for the first time, along with this new version (as well as all the live-action adaptations, and I've started reading the manga). Anyway, since I don't have any nostalgia for it, I can say clearly that, as a filmmaker myself, the direction of the new version is significantly better. As a musician for films, I also find the music to be less impactful. And as a viewer, I enjoyed the 90th version just slightly more. If I were to introduce Rurouni Kenshin to someone who isn't used to older animations, I would definitely recommend the new version, because,for me, it was just as good.