BOth clams look good! The reason I asked is because there have been some issues w/ clams coming from vietnam lately.....they wind carrying a protozoan which causes them to curl up and the mantles look like they are pinching together. I have two croceas whihc are doing this right now. There is a treatment for it so its not the end of the world...just a PITA.
If you see your clams mantle starting to curl up or pinch together PM me and I'll give you the info...
Nick