I think both shows need to be watched if you like AI/SCI-FI related themes. Steins Gate 0 has Amadeus - computer AI with memories of Kurisu while Ghost in the Shell has Makoto Kusanagi who is an android with a human brain but no recollection of the past. Ghost in the Shell has a lot philosophical commentary on what it is to be an android/human and what is the boundary between them.
They both present a bold statement on perseverance and the miracles it's capable of. Huouoin Kyoma VS Shouyou Hinata? Very different personalities, sure.. yet that same trait they share - the talent to go for that extra step in a moment of doubt/failure/hardship - is what makes for a rewarding watch and expands on the experience of S;G0 (watch Haikyuu!! after S;G0)