Just look at their boxart.
They'll look amazing together.
Now listen to Sakamoto Miu's voice. And then Miriam Stockley's voice.
Now listen to Vocaloid Miriam. And then the tiny bit of Vocaloid Mew that was posted in the news section.
They'll sound amazing together.
That is all until I get more fanarts and all that jazz. And of course until Mew is actually released.