Confused by Samsungs 21.5 'Wide'

Hi,
I haven't done a monitor purchase for a really long time. Still using a CRT so i'm lost with LCD tech.

I've been looking at a few models but i'm particular about color so i'm leaning towards samsung and lg(thats what i think i should)

Looking at the following few models.

Samsung 2233SW Plus

LG W2261VP-PF

LG W2243T-PF

Their listed resolutions are all 1920x1080 which are Full HD and theoretically speaking 16:9, but are they really 16:9 or 16:10?

Samsung lists the Samsung 2233SW as 21.5" and the Samsung 2243SWX as '21.5" Wide'. Whats the difference if their both the same native resolution? would the 2233SW stretch the image vertically slightly? I would get annoyed by that.

Comparing the other two models, are they better? Would greatly appreciate comments from everyone.