The bull looks out-towed in the front feet. Might just be the way he is standing, but I don't like the way he slopes downward from tail head to shoulders. Something just doesn't look right to me. Appears to be adequately muscled, but nothing excessive. Might also be a little sickle hocked in his hind legs, but that again may also be the way he is standing.
The calf appears to be pretty wide across his top for being 3 1/2 weeks old, but that is about all you can tell at this point. Evaluate him at weaning, and then again as a yearling and you will be able to tell if he has what it taked to be a breeder or not.