[dginev]

Same HTML backend generator (latexml), different frontends, and different coverage of arXiv.

Also, ar5iv may disappear very quickly, since I am unsure if it's more helpful or harmful. But I'll definitely lean on the public attention to keep asking arXiv to integrate an HTML preview for their articles. In the one-and-only arxiv.org itself.

Lastly, one difference that may ignite a curious debate is that ar5iv is committed to being MathML-native. Yes. MathML is the only markup used for math syntax, and you'll see it rendered directly, undisturbed, with Firefox today.

Over 500 million MathML elements in the full dataset too, pretty awe-inspiring.