Koukaku Kidoutai: Stand Alone Complex, Zankyou no Terror Recommendations
Both anime have terrorism as a main part of their story. Both excell in visuals and sound. But, GitS is way better in everything else. If ZnT is like a dull painting with beautiful borders, then GitS is like a chef-d'oevre of a painting with every kind of detail and masterful handle.
First of all, this comparison can be applied, more or less to all of the Ghost in the shell franchise. these two animes has a lot in common, first, they has both a serious tone and so mature, even though Ghost in the Shell is sci-fi and Zankyou no Terror isn't , but they're still both so realistic and deal with social and real life issues each in its way, they both includ Police and detectives and mysteries and mysterious characters, both enigmatic and require a certain deal of intelligence to keep up with them, they both include internet Hackers even thought this's much more