Took some pics of the kids tonight in the bath, not great, but you can see the differences between their shells. Octavia is the bigger, yellower one, Mr.T is the smaller, browner one. He was starting to pyramid, but hopefully the higher humidity regimen will help. I couldn't get the pics to upload, so I've put the link from facebook.
http://www.facebook.com/album.php?aid=240290&id=794032599&saved#!/album.php?aid=240290&id=794032599
http://www.facebook.com/album.php?aid=240290&id=794032599&saved#!/album.php?aid=240290&id=794032599