I purchased both the Cacao and Nectar flavors and tried both of them and I'm very surprised. To get right to the point, the Nectar flavor tastes plain weird, I don't really know how else to describe it. It's supposed to taste sweet, which I guess it does when it's going down. However, the aftertaste is completely nasty. My mother said it kind of tastes like lemon a bit and I can see that a little but it's most definitely not pleasant. However, I also think the same about the original Soylent, I just can't stand the taste. Maybe I'm just not into the 'subtly' and not so subtle sweet flavors.
Cacao on the other hand is hands down my favorite flavor. This was almost to no surprise though, I completely love Coffiest. In my opinion it tastes a lot like coffiest, with less of the chalky taste you can kind of sense with coffiest. Basically it's the same thing without caffeine, take that how you will when deciding if it is better or worse. Again, in my opinion, I think that cacao tastes better than coffiest but taste is subjective. If you like coffiest though, no doubt you'll love the cacao flavor.
On a side note, they are a fair bit expensive. Why the price jump between the original and these? Either way, it's a shame theres no tester pack or something like a mixed variety pack as now I basically have 11 1/2 bottles of nectar soylent that are basically going to be wasted. Nobody in my household likes it and 2 of my other friends hate it, it's a shame really. Same goes for the original Soylent as well, I have a bunch of those just lying around as I can't stand the taste.
All in all, in my opinion Cacao is a straight 10/10 for me and Nectar is like a 3/10, not something I like even if the bottle looks the most appealing. Keep in mind taste is subjective though, if you like really sweet drinks, maybe Nectar is for you, I just hate the fact you need to spent $37.05 minimum to find this out.