Zi Chuan (2024)

Yuan Zhong is a fox high priest. He is an immortal who possesses the divine hand. With it, he defeated the ghost clan and brought an era of prosperity. Jin Tan Yin is an artisan goddess who makes magical artifacts. She descended to earth to kill Yuan Zhong and get back the divine hand of the god Tang Hua. Yuan Zhong is harassed by his own fox clan and Jin Tan Yin decides to help and protect him. The two of them will have to face personal enemies, and a secret will be discovered. Yuan Zhong rescues Jin Tan Yin from a trap. Reunited again, the pair of lovers join forces to defeat their enemies and restore order in the world.

Source: (Baidu /TvMao)

both have a focus on brotherhood
both have mysteries from the previous generation
and current war/revolting groups
both include a little bit of romance
both have dark aesthetics

if you want to see more of the main lead actor, Yang Xu Wen , check out Love in Time . I know he played as guest in other dramas, but Eternal Brotherhood is the best I had seen him in and Love in Time is the second imo.

AJTL has group of military brothers on a mission. They deal with a lot of dangerous situations, political intrigue and there is enough romantic plots to fill you up. This is slightly different as the brothers are not always together, but you see how they are guided by the common goal. Romantic stuff is in EB too, but I am on ep 19 so will have to see the end.
Liu Yu Ning plays in both, and the masculine is nicely balanced with the female subplots. 3 brothers, 3 women...