1984 by George Orwell was strongly inspired by We by Yevgeny Ivanovich Zamyatin. He was a former Bolshevik who grew disillusioned with authoritarianism, was critiquing the nascent Soviet bureaucracy, the philosophy of Taylorism, and the loss of individual imagination and soul in a collectivist project. He was warning against the trajectory of the revolution.
We is a modernist novel. It is fragmented, philosophical, and heavily reliant on symbolism and stream of consciousness. I would suggest to read We by Zamyatin, to the readers who prefer modernist complexity over narrative accessibility.
We contains a more pervasive and psychologically intense exploration of sexuality, which is essential to the protagonist's philosophical unraveling.