What do you mean by super-seeded?
If a Queen from KI makes offspring that develop into a Queen, and they mate with a mainland drone, their offspring will benefit from hybrid vigor and should produce superior offspring. A queen bought from KI will have 90%+ Ligurian genetics, whereas who knows what percentage a mainland Ligurian is actually Ligurian. Some breeders say they get their Queen's from KI, another says he artificially inseminates them.