Nectar & Unjury are both the highest quality protein you can get. As far as what tastes better, well that tricky. I definately think all sleevers should have a container of Unjury chicken soup, it's a great break from all the sweet proteins. Unjury Chocolate Splendor really does taste like chocolate milk and when mixed with almond milk it is pure heaven. I'm not a big fan of the Strawberry sorbet, just too sweet for me.
As far as Nectar goes, I'm kinda hesitant. Fuzzy navel was actually my favorite from them. I also liked the cherry & the chocolate truffle.