It probably isn't much different--but after reading about Soylent, I bought a few six-packs of Ensure just to try out the "don't feel like cooking/eating and would ordinarily eat something bad for you? drink a meal!" concept. I ended up crashing--hard--a few hours after my "breakfast." It was absurdly sugary. Basically it felt like marketing had demanded a product that "tasted good," so the ingredients list got a giant extra helping of sugar. If Soylent were just a version of Ensure that is focused on a sane balance of calories between carbs, fat, and protein, I'd personally be very happy with it.