This may be an odd question, but I have looked around a bit and have not seen an answer. How similar are the tastes of the powdered mix, and the RTD? I ask because there is nowhere near me that I can get some samples of the powdered mix, but I can pick up RTD singles from GNC. There are a few flavors that I would like to try but dont want to waste the money on a tub and not like it. Thanks for your help.