Currently there are two song attributes that I think could be merged: Kasane Teto and Kasane Teto SV. I understand that there is a technical difference between the two -- the former is for UTAU and the latter is for SynthesizerV -- but I'm not sure if the difference matters to those looking for songs sung by Kasane Teto. I think it would be easier to find songs sung by Kasane Teto if the two attributes were merged, since they more or less refer to the same singer. That said, I am not familiar with how Kasane Teto fans perceive the difference (if any) and with vocal synthesizers in general to definitely merge the two.