Bambo??
I might use bamboo instead. [8D]
I really don't know which would be best. I've never made a bow from white oak. The red oak bow I backed with hickory is still shootable and I made it very short - 66" for a 31" draw. It was my first oak bow and I thought the hickory back would let me get away with it. The bow has a lot of string follow - don't hardly have tobend it at all tostring it - but it's still together.
I'm sure bamboo will be just as tough and a bit lighter. So it might yield a tiny bit more arrow speed.
Frankly, I'd choose whichever one looks best to you.