My blue Luna is actually bluer, but it's much less pretty. It does have the steel ring around the fire button, however.
Shamed myself into trying out the Spruzza. Compared to the Luna and, especially, the Pumper, it is clunky and awkward and kind of uncomfortable, and the location of the pumping lever--on the side--is less convenient than that of the Pumper. It's nice that you can fill it without removing the juice box, even though Asmodus says you shouldn't, but, all in all, I'm glad I only bought one.
Since I didn't feel like building, I put the Galaxies that was on the Pumper on the Spruzza and figured I might as well wash out the Pumper's bottle while I was at it (it's been months). I guess the only way to clean the tube in the mod is to fill the bottle with water and pump it through the 510? (While holding the mod upside down, of course.)