I don't listen to enough vocaloid music to have much knowledge about the differences between them, I do definitely want to get one next time I feel like spending some money on music software though, have to start paying more attention
listening to this I really can't get past how incorrect a lot of the pronounciation is. I suppose there's probably some of that with the japanese vocaloids too but I don't notice it since I don't understand the language anyway -_-