I'm planning on placing an order for a full sized autobiography in either Mariana Black or Causeway Gray. I love black but hate the associated maintenance and usually inevitable swirls that may appear our time. That said, both of these colors are very dark. Does anyone the n there would be any difference in maintaining either color? My first choice is probably Mariana black. For the interior, I was thinking cirrus / ebony for both interior colors. Thanks in advance for the help.