One nice thing to have nowadays compare to several decades ago is: we are now have vast array of choices, look at shampoo for example, there are more than 1500 SKUs available in the store, which one is the best for you?
Tell you what.. they are all the same, just select randomly, you will have a pretty good chance that the brand or particular SKU is good for you. Yes one probably slightly better than the other, but do not waste your time too much on making decision, just choose one and move on.