226BW and 2232BW are pretty much the same thing, just with a different design. The 226CW offers a W-CCFL backlight offering an extended colour gamut. That's about the only real difference. Whether you get an S-panel on any of these is a gamble afaik, and there are also reports that the overdrive impulse is poorly set up on the 226CW, meaning it doesn't really function. As such, responsiveness in practice is behind the other two models.