Here in the UK the Thai-manufactuered Flying Goose brand is widely available and incredibly delicious. Much better tasting than the Californian brand IMO.
However I find most Asian products in the UK always seem to have crazy amounts of sugar in them which I'm not a huge fan of.
If you look at nutrition facts for larger containers it's about 9% sugar by weight.
(It starts out higher in sugar, but some of that is consumed during fermentation.)
I have a foodservice jar of the stuff. I'll run out by 2030 or so.
My fride, my pantry and my local Asian shops would respectfully disagree with that statement.
Hui Fong Sriracha is less sweet, less garlicky, brighter and the chillies come out way more. It's not the same product as the Flying Goose brand and they certainly can't be substituted for each other. I love 'em both.