Moon and Dust

Both Chinese shows are pretty unhinged with unhinged mains, where one is (self)destructive. And kind of play with the honorific Ge Ge / brother kink.

They have the same main lead and they are both new chinese bl dramas yessssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss

Similiar :
They're both step brothers
Both are not blood related

Difference :
Both are from different countries

Similarities:
Both are lgbt series based in china ,
They both are not blood related
Both are miniseries

Difference:
The first one is the brother who adopted him and the second on is they're step brothers

Both have pseudo brothers (not blood related). In both dramas the younger one is the one who chases and the older one is in gay denial.
Moon and Dust is a cheaper production and it has a darker edge.