Maybe I am crazy, and certainly no expert, but in that second photo, it looks like a "colon" underneath the anus... which would mean boy, right? Maybe I am seeing things...
I am having a hard time telling from the photos. The first one looks like a boy to me, the second like a girl. I'm no expert, so I guess it's no wonder I'm stumped.
Usually if you know you have one girl (like the torbie), then you can compare them to the others. At certain ages, its easier to tell. Usually I sex kittens when born. When they are 1-4 weeks old, its harder to tell apart till the boys get more where they should have more.....