Maple is brighter. Rosewood is warmer. It's a very subtle but noticeable difference. Maple generally feels smoother, and rosewood is more porous. Rosewood feels more grainy.
Some folks don't care, some people can't hear a difference. Live, it won't make as much as a difference as it would while recording. Also, the placement and pressure of your fingers on the fretboard will vary the amount if influence the fingerboard wood will have on tone.
Go with your gut; it already told you that you prefer maple. Personally, I prefer rosewood.
Some maple boards are finished with tung oil, lacquer, or poly.
Ebony and Pao Ferro are also used. Pao Ferro is a bit brighter than rosewood. Ebony is bright and hard as nails, usually first choice for fretless, and standard on violins, cellos, upright bass, etc.