because samsung made 2 versions, the 's' and the 'a' model. and according to the reviews on overclockers.co.uk and bit-tech, the 's' model is better.
bit-tech.net | Samsung SyncMaster 226BW
"S v A
There has been some debate on various forums over the last few weeks about the panel technology inside the 226BW. One of the best (and longest threads) is here. There appear to be two versions of this monitor - one designated 'S' and one 'A'. We have the S panel here for review, and some gamers have been reporting that the S is a higher quality image.
Whilst the raw specifications on the two panels are the same in terms of contrast and response, but some are seeing slightly better image quality on the S, with the A having very noisy image dithering. Side by side, we are told there is a difference - although we have not seen an A panel to be able to comment on that. It's something to be aware of when ordering this monitor - you might want to check which variant you're going to be getting from your retailer."
S IS BETTER!!! lol