Hey guys. I watched both 1999 and 2011 animes and only started reading the mangas from when the anime ended so i was woundering if there are any differences between thr manga and anime since 1999 anime is more detailed and had more episodes

then the 2011 one so maybe thats due to the manga.i thought maybe the manga has more too. If so please let me know.
Epis 2 (1999) - Kaijinmaru -21.16-