Board Thread:General Discussion/@comment-917693-20130106140709/@comment-4565782-20130109053945

especially for example Ali it seems really weird not to note that's she's similar to GUMI as the tags for 野生のGUMI are attached to many of her songs. "She duets most often with Ten, forming the "Viviten" collaboration base. The duo are also often called RL! Rin and Len due to their similar thin, strong voices and nice balance." Ashe himself even commented and joked about it saying that his voice does sound a lot like Vic Mignogna's voice

Okay, in all those cases it appears that the singer doesn't mind being labeled as being similar to so and so, so it's alright to leave those statements on the pages.

So if a utaite is tagged as being similar to a certain Vocaloid, especially if the tag appears commonly and the utaite does not delete the tag, it is alright to do so. Basically if its a popular opinion (with multiple proofs) then it is okay.