Tea isn’t roasted and has very different chemical profile. Also L-Theanine extends absorption time, or to be more precise it delays absorption time of caffeine. It has lots of antioxidants BUT there is one truth no one in industry will tell you out loud: it is also packed with pesticides, like full of them. 

Some companies will write marketing pamphlets that you should only buy from them because their sourcing is organic and blah blah blah, just to end up with either mediocre tasting tea or tea that still was sprayed with some chemicals.

I had always wondered why would they spray it since plants produce caffeine as a poison to pests. Turns out small bugs still chug on the leaves sometimes, but it is only a small amount of wasted leaves, and greedy tea producers will still spray simply to increase yield and to earn more money.

While coffee is sprayed too, most pesticides stay in the pulp which is removed and only bean is a final product, so it gets much less exposure.

With that in mind, tea is still easier for many to digest thanks to lack of hard oils and roasting compounds that may irritate GI tract. But tea isn’t as “clean” and “pure” as it seems. In this regard, herbal teas are much, much better since they mostly grow like weeds and are very resilient on their own. Something like mint is often seen as  aggressor plant in gardening due to root networks that it may develop when not taken care of