I've always wondered this: What is availability like for this stuff in foreign countries? I can go to the store now (NE US) and find the original plus another 4-5 knockoffs. Even cheap places like Save-A-Lot has bottles sometimes for $3 or so.
Edit - looks like in Europe we usually have a Thai brand, while in the US it's mostly the interviewed guy's brand. I never paid attention, I don't like it anyway.
For hot sauce, I don't bother with anything under 100k SHU (tobasco for breakfast, however)
Pretty nice profit margin there, now that the wholesale price is no longer a secret...
You can easily tell which are the knockoffs - http://www.foodrepublic.com/2013/01/17/how-spot-fake-srirach...
As far as the name Sriracha hot sauce is concerned, that is actually the original original. They used to bottled it differently but have changed to this squeeze bottle just recently, probably to compete with the rooster brand.
And even then, it's a friend of mine who brings it along (they know i like spicey stuff :) ).
But none the less, Belgium isn't an easy market for anyone. Dutch, french and even German language. In Brussels, there would probably be a lot of English speaking persons to ;-). So i wouldn't generalise my experience to anyone (every webapp requires localization here :-) )
[0] http://www.mightymart.co.nz/product/Suree-Sriracha-Chilli-Sa...
The brand difference is analogous to ketchup: Heinz vs everyone else - tastes a bit different but noticeable if you're used to it.