I call this second one wall dolphin, and it definitely feels a little different. Maybe it would be more intense if I brought my feet closer to the wall. In any case, I can feel my shoulders stretching.
This third one is an easy position for a pec stretch. Sometimes I do this in side angle pose, but in this position I can just concentrate on the pec stretch. I move my arm around until I feel the most stretch in my pec and then just let my arm hang there. With my arm straight back behind me I feel more of a biceps stretch and if I move it more toward my feet I feel more of a shoulder stretch.