Since you haven't mentioned the other question, the only answer you'd posted to day was [this][1].

On [this answer](http://superuser.com/questions/683234/get-value-between-two-commas-using-vba/684204#684204), the question is tagged with [tag:vba]. Looking at the tag definition, the syntax highlighting language is set as vb, so the prettifier `<!-- language: lang-vb -->` why is why you see the highlighting as in the second image.

On your today's [answer][1], the question originally didn't have [tag:vba], so no syntax highlighting was applied.

Then, you forced `<!-- language: lang-VBA -->` which has different colour syntax highlighting than `<!-- language: lang-vb -->` which is applied to the first question. 

hence, the difference. See the [revisions here](http://superuser.com/posts/813440/revisions) to see how the highlighting changes


  [1]: http://superuser.com/a/813440/4377