I think there is a more obvious point no one has mentioned. The OP was basically wondering if there is a difference in quality/genetics from a big name versus a little name. Such that a beginner popping out a pretty snake is a fluke. Big breeders and small breeders alike all have to get their snakes from somewhere. So a beginner who pops out a beautiful snake may have breeder animals from a big name and that big name may have gotten their original breeders from someone smaller who actually originated the morph, ect.. So you could buy from a beginner a snake who has direct lineage to a big breeder. But the kicker is that hot looking snake made by the big guy could come from a hot looking snake he picked up off a little guy.

So, I think it all comes down to the quality of the animal sitting in front of you. Big breeder, small breeder or beginner breeder can all make smoking hot animals. I think there are a lot of wild card factors that have a big influence on the quality of animal produced such as quality of the parents, husbandry, overall health and quality of food. So I think I will echo what a lot of people have already said that if the breeder (bog or small) has a great looking animal and a good reputation, I would not hesitate to buy. Now if the breeder was new and had no reputation, I may still consider getting the animal if it was something I wanted.