What are your plans for them? While they may not be halter horses, they both look like pretty decent horses. I think their top lines look thin, so some more weight and muscle should help them a lot.
It all depends on what you require of them. If you say "I'm going to show them" vs. "they are going to be trail riding horses," will depend on how suited they are for you. I personally would adore either one of them! But I am just a trail rider. But I don't see anything really wonky on either of them. I think the withers may look funny on the gelding because of where the white of his mane meets the black on his back. So it makes the withers more pronounced looking. But withers are actually a pretty good quality for holding a saddle. And I really think they will look MUCH better with some weight on them. All the photos of their parents show horses at a better weight. So they might look like their parents with some feed and exercise. But I don't see any horrible faults with them being sound and healthy. Sure, a more muscular neck would be nice, but you don't ride the neck. So it goes back to, what are you planning to do with them? They really are sharp looking, especially together!