You will be playing a "panel lottery" with the Samsung 226BW. There are 3 or 4 different panels being used to make this monitor. The best is the "S" panel made by Samsung. Next comes the "A" panel made by AUO which according to some reviews can be almost as good as the "S" panel after careful tweaking.
Now comes the bottom of the barrow, the "C" panel which is made by CMO is considered "horrible" by some people. Supposedly there is another "C" panel recently introduced that made by CPT.
At first it was very easy to distinguish which panel was being used 'cause the sticker on the back of the monitor will have "S", "A", or "C". Now they removed all type of identification. The only way now to identify which panel is being used it to take your Samsung 226BW apart. That would void your warranty.
I don't really know the 22" LCD market since I've been researching larger LCD monitors, but I would probably choose the Viewsonic if someone pointed a gun to my head.