The IDN domain is in all respects the same as other domains with an additional iodine plus, which is that it can also contain letters such as čćžšđ.
This makes it easier for users from our speaking area to reach your domain.
Therefore, keep in mind that the domain kuca.rs and kuća.rs are two different domains. So let's say if you want to register the domain kuća.rs, keep in mind that someone else could register kuca.rs and thus threaten your position on Google or maybe take over clients.
In addition to that competitive issue, a very positive thing about it is that, for example, a cake is really a cake and you certainly wouldn't register a domain kolac.rs which has a completely different meaning than the word cake, so it would be cake.rs
sok.rs or šok.rs
The price of the IDN domain is the same as for the previous .rs domain.
Note that there is also a Cyrillic .srb domain that contains all Cyrillic letters a and the price of a .srb domain is lower than a .rs domain.