Is there a big difference between Stereonephthya.. Carnations And ... Dendronephthya Carnation .. Both of the Leather family..?? I have read where the Dendronephthya Carnation, is very, very hard to keep.. And can't find much on the Stereonephthya Carnation Leather. I have a Red/orange and a bright pink Stereonephthya spp. That will be here monday.. And info..?? Thanks. Larry .