Wood is for show. Rubber for go. Rubber gives me good grip in cold, hot, dry, or wet weather. Sucks up a touch of recoil and tolerates the wear and tear of ridding on my hip all day doing other things.
And before you wood lovers get all incensed at me, grip comfort is number one for a revolver that is being used as a tool (not a safe queen) and I have never found a wood grip that is as comfortable in my hand (especially under recoil) as a rubber grip. If you have, more power to you. For me all my revolver wear rubber grips except one and it ride the shelf in the gun cabinet almost never being used.