Can Yandex downgrade a site in the search results because of the same domain?

Question

Search Engine Optimization

Good afternoon!
Will the same names and domain (almost) affect the search results?
Those. site.ru has been around for a long time
. Site.su needs to be created, the themes of the sites are the same.
Will it affect the place in Yandex?

Answer 1

Write a letter to Yandex. No one knows the answers to such questions, since the work of their internal indexing and ranking algorithms is a secret.

Answer 2

Once I asked a similar question on the searchengines.ru forum, they answered that it had no effect

Answer 3

Most probably not. No one here can give you an exact answer.