Rook City increases difficulty dramatically in the villains. Infernal Relics has far more complex heroes. It's a wash, so you should probably get them both. ;)
General criticism seems to say that Infernal Relics is the more interesting of the two, specifically due to the intense difficulty of the villains in Rook City and the innovative mechanics of the Infernal Relics heroes. Either start base and see what you like, or just get 'em all.
General criticism seems to say that Infernal Relics is the more interesting of the two, specifically due to the intense difficulty of the villains in Rook City and the innovative mechanics of the Infernal Relics heroes. Either start base and see what you like, or just get 'em all.