code to check wether the site is pro site or not

Hello, I want to know, what code to determine whether the site is a pro or not,
for example: if it is not pro site, comment form does not appear. If the site is a pro then the form appears,
so I have to use "if" and "else" statement on the theme.

same as: if is_home (), or if is front_page ()

is there a way to do that??