i hope people aren't being biased while voting, lol.
spica is amazing with their vocals! u v u

I love love love Spica and I've been listening to their songs like crazy~ they have the strong vocals and they harmonize well together<3

okay this is my opinion, so don't take offense:
I don't really know mamamoo, but I know that Spica have some really strong vocals. Aside from Hyorin, I don't think the others have particularly strong voices. GG is....meh. In my opinion, they're just faces