Style #202 is a more modern design with a smooth rail on top rather than exposed picket points.
Style #200 is a modification of #202 which combines the safety of a top rail with the traditional look of pointed pickets below the rail.
Modified Style #200 or #202 are variations of the above. They are only available in a 54" height and are designed to meet stringent pool enclosure codes that require a 45" spacing between horizontal rails. These fences are modified so that they do not have the pickets extending below the bottom rail.