That's a great comparison for someone who doesn't have experience with all of those types yet. If you don't mind me asking, where exactly is it that you want to be? Do you take use those amounts to de-stress during the day or for deep relaxation with ensured sleep? Also, how many servings do you make with those measurements (Im assuming a serving would be around 4-5oz brewed).
"Where I want to be" is where my anxiety is greatly reduced, if not completely gone. This usually comes with a pretty fair sense of well-being and if the kava is heavy, that "couch-lock" sort of feeling. That all being said, I don't drink so much that I need to go to sleep within an hour, or something like that. While it can be sedating, it is not to the point where I
need to go to sleep.
For example, I could go out and drive if something emergent came up, or do some homework or something that is pretty cognitively difficult. So, in that way, I am not impaired or intoxicated.
As far as "servings" go, I usually end up using about 2-3 cups of water (16-24 fl oz) and I consume the whole bowl, all in one go.
I don't space things apart and drink a batch over a period of time unless I am drinking a kava high in kavain.