The cheese in Isa's "Mac & Shews" *http://www.theppk.com/2011/02/mac-shews/) I think tastes a lot like ricotta. It's a cashew-based cheeze but with sauerkraut involved. I used it a few weeks ago to make a lasagna, and it was amazing.
I saw that Mac & Shews recipe, but DH absolutely despises sauerkraut. Is the taste noticeable or does it just add a tangy element?
In the finished product, I don't think it tastes at all like sauerkraut, but its influence is definitely there. Like you said, it's more a tang that's not always present in a cashew cheese. It also lends that "aged" quality that was the inspiration for using it.
I will note that before it goes in the oven, it doesn't taste amazing, but after it comes out (either in the mac 'n' cheese or lasagna), it's delicious.