The first thing you notice about Third Street's "Authentic" Chai concentrate is its significantly stronger spices. It is also sweet, but not excessively so. Where Oregon Original dominates the "sweet" and the Chai Company embodies the "bold", then Third Street rules in the "spice" department. I'd also say Third Street is full bodied (but slightly less so that the Chai Company). I must admit, I prefer chai with a little kick to it, and this is one of my favorites. To me, chai needs the spices to stand out a bit, or it's just not chai. If you are looking for stand out spices, Authentic by Third Street is a good choice.
Troy the Chai-Direct Chai Tasting Guy