Hi there
Ideally, create one page that serves both search engines and users, because you want users to find your page via search engines and you want search engines to be able to crawl your content. It's thought that Google is getting better at crawling Javascript, but you need to make sure that you text or content is readable in a text-based browser or is visible to Google with Javascript off. Here's a resource for you.
That being said, focus on having one page for the content you're trying to create, so you can put more SEO efforts into building the equity in that page. You can also build other pages around variations of that topic that link back to that page, and link to these new pages from the one main topic page as well. This will help build your site from both a topic standpoint and passing linking equity throughout your site.
Let me know if this makes sense or helps. Best of luck!
Patrick