HyperText Markup Language (HTML) vs Org-mode

Styling through CSS is declarative and powerful, but somewhat inadequate for print without expensive tools like Prince.

Natively understood by browsers, you can author and view HTML on virtually every computer without any additional software.

HTML is fairly simple for both humans and machines. It can be repetitive and burdensome to type, but less so than most other XML or SGML-derived formats.

JavaScript code can be embedded directly into a HTML document.

Org-mode is characterized by a flexible and versatile system with adaptability to different workflows, making it comparable as an Evernote alternative. It is at once simple and complex., which helps it to compete as an Evernote alternative.

Org-mode has some built-in agenda functionality. You can schedule tasks and assign various degrees of importance to each of them. Org-mode agenda can also be synced with Google Calendar.

Org files are plain text, and lend themselves well to version control. Emacs also has good integrations for various VCS.

Notes and to-dos can be synced with Trello, Toodledo, Simplenote, Orgmobile, or with tools like Git on Github, Dropbox, Google Drive, and Bitbucket, while WebDAV (with iOS and Android) can also be exported to PDF, mind map, LaTeX, HTML, Docbook, or txt.

Org-mode has some basic spreadsheet functionality. Other than auto-formatting ASCII tables (a notoriously annoying problem), it also has support for LISP-like syntax to define equations or any other functionality that can be achieved through spreadsheets.

Org-mode has out-of-the-box support for Latex: it can immediately parse equations (or other Latex markup) and can even compile notes to PDF or HTML.