Sorry guys, I was swamped yesterday.
They are the same.
I got the small piece as a LE yellow-eyed purple watermelon. As it started to grow I had another coral fall on top of it, which created a split in the skeleton, but no damage to the skin. I decided to go ahead and split the two, and put them in different spots. The darker piece lives about 6 inches off the bottom in the some rock work, and it’s about 80% shaded. The rounder piece, lies in the sand next to my other watermelon, and has a more vibrant mix of colors, and also a little bit better growth. This is after about 5 months of being separated, and I thought it was interesting how different the two were starting to look.
It also shows how two echino's in other people’s tanks can be vastly different. These are only 6 inches apart.
Anyhow, thank's to all that participated. This was fun.
Drew