There's also the flavor factor. I can see how one would say that Radio is sweeter than Virus, but to me the spicier notes in the Radio make it seem sweeter to me than Virus. I find Virus a cleaner flavor despite all the twists and turns. Radio is more dense, and intense, while Virus is dryer and crisper to me. Taste is such a funny thing. I'm fascinated with the whole taste issue in vaping.
I completely agree with everything you've said, but it really does seem to depend on where both e-juices are in their development. If I had to pick one aspect about Nicoticket's flavors that I like best it would be the whole "evolution" process that so many of them go through. If I had to pick one aspect I liked the least it would be the sweetness level. It's too bad that we can't get less sweet eliquids and just add more sweetener ourselves. You can't lower it but it's easy to increase it. Even so, Nicoticket is still the best e-liquid manufacturer by far.