Nice comparison Robert, it looks like the Adonis have a solid black ring around the mouth while the master kracks have a more splatter pattern. They still look very close. Look at the master krack at the bottom left hand corner, that polyp looks like it could have a solid black ring which to me makes them almost identical. I don't have either but if someone could chime in about the brightness of each. Because that's the only other distinguishable characteristic that I can see.