Bob...Either maple will work well and I would choose based on figure rather than strength (as both are lots strong enough), or at least how well the parts will fit the available usable wood. The stuff I'm currently using came from a load of mixed rough lumber I acquired from a mill that went under some years ago, and I've had it stacked for several years. Be careful to avoid runout on any parts so that the wood doesn't splinter under your blades, scrapers, knives, or sandpaper.

Peace, Mooh.