It's a personal thing really. Some may prefer the looks, sounds, and feel of a rosewood neck/fingerboard and other may prefer maple. You do mean necks and not fingerboards right? Rosewood necks are very expensive.
rosewood
RN = Rosewood neck (I'm assuming RW also equates to Rosewood) The alternative is MN which signifies a Maple Neck
ash or alder body with hard rock maple neck with maple or rosewood fingerboard
different timbers have different qualities. with specifics: a sound board is best made from softwoods like: pine, spruce, cedar etc a flamenco guitar would have a softwood back too rosewood Maple and mahogany - which are hardwoods are highly appraised due to their qualities and can construct sides back and neck. for bridges and finger boards very hard woods like - maple rosewood ebony and wenge for bracing - recommended Adirondack (red) Spruce
maple i think
This guitar is made mainly out of wood which is glued together. The Thunderbird bass is designed concurrently with the neck through which is made out of maple or mahogany wood. The body is made from mahogany wood while the fretboard is made from rosewood or ebony.
The wood used to make any kind of guitar is based on density, weight and above all, its acoustic sounding properties. Generally favored among reputable guitar manufacturers are blackwood, maple, cedar (though light and expensive is quite strong), cypress or similar. The neck is often made from rosewood which is fairly strong.
A guitar neck is usually made from wood, most commonly maple or mahogany. Inside the neck there will be a metal truss rod that stops the wood from bending out of shape.
Fender's first production guitar was the Esquire. It had a single pickup, an ash body, and a maple neck.
This guitar was made in the early sixties, very well built, though the pickup did actually tend to go out on this model
The Gibson Firebird guitar was first manufactured in 1963. The body of the guitar is made of mahogany wood, the neck is made of either mahogany or walnut, and the fretboard is made of either rosewood or ebony.
Electric wise woods that can/are include: Body Mahogany, alder, ash, basswood, NATO, poplar, maple Cap (if any) Maple (flamed, quilted, popeye, burl, spalted, plain, etc) Neck Mahogany, maple (incl fingured), NATO Fingerboard Rosewood, maple (incl figured maple), ebony, sometimes bubinga Then theres various metals including chromium, nickel, steel etc used for the hardware. Then we have plastic used for things like the pickguard and stuff.