The bull was a piece of guerilla art that was created as a 'gift to New York' following the stock market crash. It is on loan to the city and the artist owns it, as well as the copyright.
Fearless girl was created as part of an advertising campaign for an index fund. Of course artists have long had patrons, and some wonderful work has come out of that tradition. However, a lot of that output was pictures of rich people or religious scenes. Or rich people in religious scenes. When rich people could have their faces immortalised in photographs, painting and sculpture experienced a rush of freedom.
The image of a girl standing up to the great forces of capitalism is wonderful. But it was created to sell a company, just like Dove's real bodies was. If it was a photograph or film you wouldn't necessarily call it art, probably design or advertising.
You can like the sculpture and it can be meaningful to you, but I can't see how you could argue that it's not using Charging Bull for commercial gain. The asset management company who own Fearless Bull have more than enough money to pay an artist when they use their work.
The bull was intended to stand for strength in advercity, and has been recast as a villain. The artist has every right to feel aggrevied that a huge company is using his work in an advertising campaign without permission. The pug is intentionally shit, and may not have much integrity, but its making the point that the girl lacks artistic integrity. I think the girl will be a better statue when it's a standalone piece.