Cattleya labiata × Cattleya pumila is the correct parentage.
Then if you look at that OrchidRoots page, you can see that there are 15 registered hybrids with your C. Cornelia as a parent, so it appears to be a pretty good breeder. Maybe you can find pictures of those hybrids with C. Cornelia as a parent to get a better idea of which characteristics tend to carry over.