Well folks happy to report the Garlic and Ginger ones arrived and they are gooood!
The ginger one is much more subtle than the garlic. Been using it on sushi so far and it's really moreish. Still get the flavour of the original sriracha but with a refreshing hint of ginger at the end which lightens the aftertaste. I'm planning to throw a bit in a stir fry, and use it to make a glaze for some pork belly
The garlic one, as FrenchTart said, has a huge hit of garlic but it is very tasty. Used it quite sparingly in a tomato based pasta sauce and it pepped it up lovely. The garlic flavour really punches through and the chilli brought the tomatoes out great. Also put a dab in a dark ale Welsh rarebit and it was awesome, complemented the mustard very well.
The original one was fantastic as a dipping sauce or for anything where you wanted a bit of fire with a lot of flavour. I wholeheartedly recommend using it on pizza, as a steak side and for brightening the flavour of a Chilli con carne (a dash of sriracha and a few chunks of dark chocolate give it a really rich flavour)