I own three guitars with maple necks, two teles and one strat, all of US made, I also have and aftermarket neck, unknown manufacturer. All four necks are visually more appealing on the underside than the top side. Top being the side that you can see while your playing. It's only four necks so not the biggest data pool, perhaps I should check out the ones in guitar stores... Is this done on purpose or just a coincidence? Does yours have this as well?