I think the Twice a Man sound is present, but Rhea Tucanae is more dreamlike and ambient. There's no rush; everything is allowed to take place and slowly grow. Most of the vocals are from Pixyblink and unfortunately they don’t really stand out. And this is a problem with the album as a whole, it’s almost too ambient and I would have preferred a more daring approach to the texts.
However, it’s not badly done, just a bit pale. But since I’m quite a fan of Lovecraft, this is a nice soundtrack to his work and I will for sure play this next time me and my friends explore his work through the Call of Cthulhu RPG.