I’ve in recent years started to favor reStructuredText over AsciiDoc for three reasons. 1) Docutils’s output in like 95% good, semantic HTML where Asciidoctor has a lot of issues (I would note that non-Docutils is often bad, second-class & reliant on what Markdown outputs for ‘compatibility’ (meaning less features for you)) 2) the features difference between the two I prefer the rST set (such as abbreviations) 3) the spec seems so complicated Pandoc can’t realistically have a reader, just a writer & pretty much the Ruby-based Asciidoctor application ends up being the AsciiDoc specification.

That said, I would choose AsciiDoc every single day without hesitation over Markdown the minute you are talking about documentation or any sort of technical writing since Markdown is far too feature poor & buying into one specific fork is locking you into incompatibility & other headaches/compromises.