Haha... found this in the Steamforums:
If you reflect the baseball, and it hits the scout, then you kill the scout, the scout gets an assist for getting himself killed.
Edit:
Also today on a server, Natashca model in game looked identical to Sacha (regular Minigun)
Reading this I now remember that I was wondering on this, too, for a second switching to regular Minigun. As the sounds are still different, could it be that this is the only difference? So Natascha is atm Sascha with only different sound? This would directly lead to no slowdown. o_O