@futurebird More or less yes!
The original statue was by Guillaume Geefs' brother Joseph Geefs, called "L'ange du mal." Joseph's statue was removed from the cathedral because of its distracting allure and "unhealthy beauty". It was replaced by Guillaume's. Apparently they based their sculptures on the same model, too.
The details of the story are marvelous:
https://en.wikipedia.org/wiki/Le_g%C3%A9nie_du_mal#'This_devil_is_too_sublime'