The first pic doesnt do anything for me. You can't really see their faces.
In the second ones eyes are over worked and the colour is not working for me either. Maybe try a different edit on that one.
#1 A lower camera position would have worked better here I feel. Getting down to their level makes the photo more intimate and personal.
#2 Enhancing the Iris on portraits should be subtle. Get the exposure and extra fill light right first. Before post production.
Which editing program are you using? In both GIMP and PS you can change the layer opacity. This would help on the second with the eyes. Lower the opacity so the white is not so white. I'd also suggest working on the overall edit; sepia is fine and dandy, but it's overdone in the image.
first I like the idea of chatting...second b&w version may hv favoured the eyes to some extent....In fashion photog, the angle may work with more attn on the chest....no doubt, little bit odd.