I have those RDAs except the wasp. However I have the Pixie, the VLS Oumier, and various clone RDAs (hadaly, Narca, etc.) and these are reported by reviewers to have better flavor than the Wasp so I feel qualified to weigh in.
I say go for the Hermetic by Blitz. Much better flavor wise than my drop solo, dr SQ, or recurve. I'd say it's a different flavor than my clones but neither is better than the other really.
Also it's just different because I can run claptons in the Hermetic whereas my smaller clone RDAs do better flavor wise with parallel builds in them.
Here's the guy Vic's review on it. He's one of my favorite reviewers. Especially because he compares the new RDAs/RTAs to previous ones so it makes it easy to know where the review stands in comparison.