Andrea,
If you can wait a bit longer to make the appointment I'll try and get a few recent pictures of my white slow cornish, the red broilers and the regular cornish x's I got from Welp on June 21st.
I'll say first that I'm very happy with all my birds and had a perfect experience ordering from Welp.
The slow white and red broilers are much smaller than the cornish x's (of course) I don't think mine will be ready at 10 weeks. Mine may be growing more slowly than yours will, because I have them with the cornish x's and I take the food away at night.
I'm very happy with my slow cornish and red broilers. They are more active, but still have the wide shoulder shape of the cornish x's.
Of course I'm also happy with the cornish x's, they are doing just what they were bred to do, although I don't think I'll raise them again. The extremely fast growth is so stressful for them I'm just not comfortable raising them.