Speaking of Viridis, I'm more interested in the comparison between Viridis and Yincrow RW-2000.U can ask @RikudouGoku who has both. But earbuds (Viridis) and IEMs (FH3) are very different kettle of fish. I daresay earbuds are actually closer to open backed headphones than IEMs per se (in terms of earbuds/open backed cans having good soundstage and lack of isolation/subbass), whereas IEMs have better isolation and poorer soundstage in general. I think they bring different benefits to the table so they are complimentary gear IMHO. As this is headfi, the correct answer will be to get both hahaha!
The only thing that distracts me from RW-2000 is low Impedance (16ohm) and high sensitivity (112dV). I'm not a fan of this combo