It looks like what I call a soft shelled turtle. Where did you find the turtle? If it is an Ozark animal see the link below. There is a name this animal forum which might be a good place to post your pictures. Here is a link that might be useful: Missouri Turtles

Yes, both are Box Turtles,the lighter one is certainly a boy, and the darker one might be a girl. Sometimes this can cause color variations, but often it is just genetics, sort of like in humans. Sliders (and Cooters, and other water turtles in that family) have much less domed shells, probably for pushing through the water, plus, they can get much larger.

I don't think the Painteds have the serrated edges on the back rim of their shells and the yellow with large black spots at the underside midsection lean me more towards a Yellowbelly.

You might want to post on the Home Decorating forum along with some photos.