On desktop it seems to be an even worse version of Reddit than the default (or old.reddit.com). Three columns of 'content' and the main post text (arguably the most relevant part of the page) isn't even completely visible.
(missing reddit less and less each day...)
It's a faster rewritte of the Reddit UI using some sort of in-house framework, basically it's just way faster than the normal one.
And no, it's not related to language.
Is it faster because it doesn't work on mobile?
It works perfectly on Firefox mobile for me, even better than the old version. Maybe don't use Safari.
Should be no difference. It looks like different languages. There's de.reddit.com for German, in.reddit.com for Indonesian. SH is Saint Helena I guess, which is a British overseas territory, and thus English. Not sure but that's my guess.
Would be fun and cool if submitter was linking to the Saint Helena version. I wonder what the odds would be, HN submitter + one person of ~4000 people living there, out of almost 8 billion