Widescreen is generally much better.
see, when a movie is released in theaters, it's shown on wide-screen format (look at a movie screen and you'll see)... however, when it's released in DVD, VHS, on TV, etc. no TV is that wide, so they chop some of the image, so that it fits perfectly on the TV. this sucks, because in some scenes, a person's whole head, (or part of it) is chopped off, and so you don't see everything. On widescreen format, it's the same as in theaters, except there's the black horizontal bar at the bottom and top, well, because of the ratio... that's pretty obvious.
Some DVDs have full and widescreen versions on the disk.
For example... "THE ONE" (DVD) had both versions on the same disk... before the movie started you selected 'wide' or 'full'
I have dozens and dozens of DVDs that have the fullscreen version of the movie on one side of the disk, and the other side of the disk is the widescreen version.
... so try to find one that's got both versions, but if you can't, then i recommend widescreen
