If that were me, I wouldn't touch the first Cattleya. It looks fine.
Now the second I would take out of its pot, which I think it somewhat too large for the plant. I would inspect the roots, making sure they are healthy. If not, I would trim them with a sterile tool and repot the plant into a smaller pot into fresh bark. Soak plant first to make sure the roots are pliable and also soak the bark mix prior to using. If you see any black tissue, cut it off and dust the cut with powdered Cinnamon.
