There is no such shrimp as a “Blue Cherry”. Odds are what you have are the artificially colored “Blue Shrimp” that is often sold on auction sites. This shrimp is most often Neocaridina heteropoda. It gets its blue color from either die or some sort of food. This color will not breed true and will often times fade.
There is a very small chance that you have Blue Pearl Shimp, but this shrimp is fairly new to the hobby and most people that are selling it know what it is.
Amano Shrimp will not kill any other Dwarf Shrimp. They will, however, aggressively steel food from smaller shrimp. As long as there is enough food for everybody to eat, this is not a problem!
It was a really interesting picture. I think Ibn posted it a while back. I searched for it last night and couldn't find it...Someone once posted a pic of an amano eating a cherry. I don't think it killed the cherry, but it was interesting anyway, since he picked up the entire shrimp and walked off with it