Slick;
Here's a chart explaining the difference...
http://www.anotheramazingdeck.com/20...end-decking-3/
Not a fan of Trex at all. I have seen too many issues over the years with their product. If I was building a composite deck today I would use either Azek or Latitudes. Good thread on composite decking here...
https://www.winnipesaukee.com/forums...posite+decking
Lighter colors will fade much less and absorb much less heat (cooler on the feet). No issues with scuffing and less prone than wood to scuffing except maybe IPE.
Dan