I don't think comparing vocals is really a bad thing, I just think it can get ridiculous. I can't find the comment now, but I once saw someone say that Kiyoteru sounded like a mix of Len/VY2/Gakupo/Kyo with a hint of Iroha, and it was genuinely unironic (I responded and they tried to argue with me about it). It's so funny thinking back on it now, but if you need a whole list of synths to compare one voice to, especially if that list includes loids that came out after the one you're analyzing, I think that qualifies as a unique vocal, haha.
For me, I think I could tell apart most Vocaloids? I wouldn't be able to name all of them just from hearing them probably, but if I was given two vocals and was told to say who is who, I probably could. The only ones I genuinely can't tell apart are Rana and Unity-chan, they genuinely have the exact same voice to me orz
For me, I think I could tell apart most Vocaloids? I wouldn't be able to name all of them just from hearing them probably, but if I was given two vocals and was told to say who is who, I probably could. The only ones I genuinely can't tell apart are Rana and Unity-chan, they genuinely have the exact same voice to me orz