I agree, side pictures are needed for a complete idea.
I like Andy's udder better than Ava's from the rear. Andy's medial is not as prominent in those photos, but she's also clipped and it might be the light. Her udder is much more snugly attached all around though and she has more capacity. Her teats are pretty nice, yes they could be more centered, but they're pointing forward not out to the side. They're only 4 points on the scorecard so not a huge deal as long as they're easy to milk. Ava's udder lacks width in the rear, especially area of attachment. In the first picture, her udder almost looks too big for her. Fore udder pictures will show more though.