Velociraptor, my answer to the original question is this. When you have two proven bowwoods, and know enough to design the bow for the woods. And if your requirements are durability and shootability: Chose the better stave.
Make sure the maple species is a suitable bowmaking wood. Silver maple, box elder, and I think I remember another specie are very soft, not too tough, light weight, and fairly brittle, almost like cottonwood.