The new 'Related Articles' feature has a couple of things that make it stand out as visually different (and not in a good way) from the rest of a Wikipedia article...
1 - at least in the English Wikipedia, the manual of style calls for sub-headings to use sentence case, that is "Related articles", not "Related Articles". This is a simple fix to change the "A" to a lowercase "a".
2 - The words "Related articles" appear in a slightly different colour and size (and font?) to the other sub-headings. Please make these consistent.
3 - Could you add some words or an icon to visually indicate that, unlike everything else on the page, these three suggestions are machine-generated not manually curated. Wikipedians have gone to a lot of effort over the years to explain to the public that everything on the page is editable, yet this isn't. The design team would probably have good suggestions for how to do that in a clear but unobtrusive way.
4 - It is not normal to have "content" outside of the editable window. Since this is supposed to be a Beta Feature, could you test it as appearing as part of the "See also" section that most (english wikipedia) articles have? This is the logical place to put suggestions for other things. You'd need to carefully visually differentiate from the human-created suggestions (see point 3 above). There would need to be a fallback option for when there is no 'see also' section, of course. If you integrated these 'automatic' suggestions to the manually created section, then you wouldn't even need to have a separate heading called "related articles" - it would be just another facet of the "See also" section.