The heifer is a little plainer made, quality hay (all she wants) and some grain will help. just training the hair will also help. She does appear to be an easy going type which is a plus.
What would also help her looks in the photo is working the hair, it goes all kinds of direction and chops up her lines. A halter that fits properly, it just chops things up, gives her an odd look. the photo from a little lower, from up higher they always appear shallower than they are, and a many-petty.
Yes, I bet she looks better with a clip job.