Page vs Post. Which will have a better impact with SEO?
Considering all things equal, which of the following would have a stronger impact on my website?
If I wanted to write about the benefits of a specific service that a client provides, is it better to write about that service in a blog post (on their site) or to create a page and link off the clients services page (on the same site)?
From a structured data perspective use the type that's appropriate from for whatever you decide to push out: http://schema.org/BlogPosting for a post, http://schema.org/WebPage or http://schema.org/Article for a non-blog post.
TL;DR > A "post" is most commonly used for occasional topical content, a "page" for evergreen content - but at the end of the day they're both web pages.