My house was built in 1964 with Mahogany hollow-core interior doors. I need some replacements but am very confused with the difference between Luan and Mahogany doors sold at the major home building supply stores. Are they the same? What is Luan? Will the current materials match my old doors? I have been told by one source that Luan is a type of Mahogany, and that they are totally different woods from another.