astro fats seem to have been repackaged in a few different color lines. Same cap, just different plastic. I find it funny/interesting when people prefer one of these absolutely comparable caps over one another.
I would also love to see more caps compatible with the regular female valve rusto (as I'm sure anyone would as it's high quality paint that also has high availability), but at this point it's kind of like saying I would also like to have cheaper cigs and be able to smoke in more places, kind of unrealistic, rusto fats aren't that bad.