Problem is, you have no way of having two different finishes without having other variables. Two different guitars are two different guitars. No matter how hard you try, even if you transfer everything over, including the neck, the body is a different piece of wood. It's a variable. If you strip and refinish the original guitar, there's no guarantee you haven't removed some of the surface of the wood, and/or impregnated it with chemicals used to remove the finish, both of which change the physics of the body... a variable. You don't know what "scientific" means until you've done it for a living.