I did not know that green roobios existed until I was in a food co-op the other day and noticed it in the bulk herb, spice and tea section. I got some today and brought it home.
As with tea, green roobios is green because it is steamed after harvesting to prevent it from fermenting. Th wiki page about it stated that it was unknown at this time if it is any healthier or more powerful than red roobios. Red roobios is supposed to have more antioxidants than green tea, though not the same antioxidants. Studies of green tea have studied specific polyphenols extracted from green tea. Still, with roobios there is a large amount of antioxidant goodies to be had and no tanins, which tea has. It is believed that tanins interfere with the absorption of some nutrients. Lastly roobios has no caffiene.
I think I may use green roobios for a while. I've been noticing myself "skipping a cog" a lot mentally. I don't know whether it is the caffiene or my irregular bed times. Once I get firmly back into the habit of a regular bed time I may test the waters with regularly drinking green tea again.
I made the green roobios by bring the water up to a rolling boil, turning off the stove and then steeping it for 10 min. No bitterness. The taste was much more similar to red roobios than the taste of green tea is to black tea. It tasted pretty much like weak red roobios. The taste was good, it was pronounced and there was no bitterness.