无异于 is bookish/formal - used in editorials, essays, and serious speech to deliver a strong rhetorical equivalence: action X is 'no different from' a more dramatic outcome Y. Compare colloquial 等于 ('equals to') and 跟...一样 ('same as').
grammar
Structure: [subject/action] + 无异于 + [stronger comparison]. The 于 here is the classical preposition 'with respect to / from'. Literally 'have-no-difference-from'.
