Yes, that seems to be the seat. Mine is a different color (two-tone) and maybe a little more waffled, but I think they are the same. And from the picture your linked, I would think I am probably contacting the seat on my sit bones, but if so, it is more likely the inner part near the V on the sides of the centerline of the pelvis than on the bottom part of the bones out a little firther to the sides.
I don't really think I am getting any chaffing rubbing type soreness. So maybe the shorts are not as big of a concern yet.
I think I will get down to the bike shop at some point and see if I can try some other narrow seats like you both suggested. And if they let me take one home for a ride or two, it would be worth a look at some other models. Do you think there is any benefit to a channel design? Even though i am not in any serious discomfort besides my tail bone, it still might be more comfortable to have a little more room under tha soft spots!!