Both animes deal with the fight between the police and terrorists.
the different between them is that Zankyou no Terror focuses on the group of terrorists themselves while Psycho Pass focuses on the police side
Psycho-Pass Navi System is same as a Serial Experiments Lain system and they involve with new technology experiments
also both animes have Same electronic music and their stories are sated in the future
Both series have lot of gore and have twists and turns that will keep you interested.
Both have characters whos motives and backgrounds are a mystery at first but are slowly revealed as the story progresses.
The mystery in Baccano! is also on par with Psycho Pass 2 and its definitely good at leaving you guessing
I think that anyone who enjoyed the art plot and characters in this show will enjoy Baccano!
Both series have a "villain" whose existence is difficult to prove and thus, gets away with numerous crimes. The protagonists of the two series are similar too in the way that they are considered to be pure, golden-hearted persons. The question of whether or not they'll be tainted by hatred by the unfolding events makes both series more interesting.
If you want a more realistic and mature version of Psycho Pass 2, try Monster.
Both protagonists in each show are searching for the main antagonists who are causing great chaos in society, hoping to change it. Both antagonists have tragic pasts that cause them to take the actions they are taking now. Both of them are also camouflaged in the midst of the population and is hard to detect unless they come forward themselves.
Of course, if you haven't watched the first season of Psycho Pass, I suggest you go watch that first (that is a given haha XD)