got a picture of the end grain with no finish? if you slice a thin piece off the end, 1/4" ish, hold it up to a light and can see through it, it is probably red oak.either way, a great score!
adding to waynes link, heres a list of the different mahoganies and characteristics:
http://www.wood-database.com/#m
theres also a section on oaks
http://www.wood-database.com/#o