Sometimes the difference is just conditioning. Working out for a bulkier muscle (UKC) versus the long, lean muscles (ADBA). One of the dogs out of Matrix kennels is Persephone, who is a UKC GRCH and ADBA GRCH I. Three others they have are dual-titled in UKC and ADBA. If you have a good, moderate, well-built dog, it should be able to finish in both registries. It may not be a Top 10 dog on both sides, but capable of winning? Sure.