Typically social media external links are always no-follow. Even if you find they are do-follow, the likelihood they impact rankings of the domain is slim to none. You always want to think of the user experience when linking on social and choose the link based on if it adds value to your potential customers or not. 99% of the time I would recommend linking to the business domain over a third party, because you OWN the domain and you cannot own the third party page.
My client wants to change the urls on their social media profiles to point to another 3rd profile url instead of their domain url. Is there SEO link juice associated with the url profiles?