Taurine doesn't give an energy boost atleast, it's supposed to transport protein better and is the second most common amino acid in muscles and the most common one by volume, and vegans in a study had 78% as much of it in their blood compared to regular people (because it doesn't exist in natural vegan food, but it's non-essential so your body can make it by itself.)
I don't know about that third ingredient, to lazy to google
But yes, caffeine gives energy... It also gives less reason to eat and stress =P, so I guess it depends what will do most for you.
When I make an order from USA I will add l-taurine and acetyl-l-carnitine aswell.