Both are about ex-journalists who become tabloid reporters and take on dangerous and controversial stories that may be involved in a broader conspiracy. Even though they have a different tone, both have comedy and mystery elements.
Both the main characters work for 'third rate' tabloids and they try to use their skills to unveil the abuse of an elite power.
Both protagonists want nothing more than to achieve success in their professional life. They also can't help getting involved in their surrounding matters, even if that means putting themselves in dangerous situations. Both men lead face multiple struggles in order to climb on top, and they have a naïve view on how tricky people and corporation life can really be.
Both have similar elements, with a rogue tabloid (funded by a gangster boss) along with a driven female law enforcement character going up against a large paper (with a corrupt boss) to uncover a larger conspiracy; both are about how media shapes pubic opinion and the moral dilemmas that go with reporting. (But Hero is way better written/acted, and for being made 8 years earlier, way less cliche!)
Both of these dramas are about reporting about the truth, Pinocchio is about Tv reporters while Hero is more about newspaper reports. So the plot and main source is somehow similiar, though Pinocchio is more dramatic and have more actions than Hero but both are exciting to watch and see if the truth are being revealed at the end.