example.com and second website is subdomain of
example.example.com. Both website are same in terms of both content and functionality but written in different programming languages. Main website
example.com is in PHP and subdomain website
example.example.com is in WordPress.
Which one will get good results? Does coding platform matter?
The subdomain is a keyword like
keyword.example.com. It is getting ranked well, why?
Is it harmful to me like duplicate content like this?