User blog comment:CykeP/And Now I'm Torn/@comment-53539-20151101113551/@comment-53539-20151105101504

I actually find Vocaloids sound better when they have another vocaloid to bounce off of. Its to do with how flat most vocaloids are. The added layers are what make a song more "alive". For example, this is what makes the Sirens from MLP: Equestria Girls music works, is the fact they use multiple layers of vocals to build up a song. Switching solo duet, and trio lets them have parts of the song where you can build up, often making their chorus strong when all are singing at the same time. Also, there is the whole "strengths" and "weaknesses" of a vocal...

There is a big advantage to owning more then one Vocaloid voice either way.