I figured you were drinking something like that. The other one has a bit more of a kick to it while still being just spices and herbs and does not contain 'rooibos' which I'm really not a fan of.
Rooibos actually contains something called quercetin which some people have said helps with prostatitis (which I didn't discover until after I'd been drinking it for a while). It adds a little richness and bitterness which I actually like.