They look good, Hans. My experiences with them are the same.
But what a difference between the male and the female! I do not think this is so in my two specimen.
Have to take a better look, but now i am afraid that I have two males or two females.
How old are your animals?

Mine are from 29-07-2006.
On 30-01-2008 the "male" weighed 27 gram and the "female" 36 gram.
Do not know what they weigh now, but they have grown well.
Maybe I can weigh them one of these days (Pink Floyd ) before I go away for the holidays.