the bigger one is the pewter calico YB female, smaller one by default is the pewter YB male
the top third of her body just got dramatically darker a few days ago (she just shed a few hours ago)
here's an old pic of her:
not sure if the difference shows up well in these pics
anyway, i'm going to breed these two together eventually
imagine hitting that triple super, which i have no clue what it would look like