[quote=@Malphaestus]
I have to say, both the Tushian and the Terran singers look astoundingly similar.
[/quote]

Well, they are both largely human populations with strong military culture that descend from the same Empire originally. Hell, it failed so hard that whatever faction out there that is still technically what's left of that original empire doesn't even control our original homeworld anymore!

It's like how the Eastern Roman Empire didn't actually have Rome in it after the west collapsed. It's embarrassing.