I'm guessing there are others like me who wanted to know if the Headrush and Alto are the same except for the branding. I bought the Alto about a month ago because the Headrush speakers weren't available. When they did become available I got one of those too.
I know the specs are exactly the same except for the mic preamp in the Alto.
Anyway, listening to both of them and A/Bing between them I can't tell much of a difference.