They all use the same panel. It's a matter of how each manufacturer implements the rest of the components that differentiate them. In the playwares (I think that's the Korean website) reviews, it was primarily contrast ratio that had given this one the edge over the others, but I would say it's negligible and can be overidden using software.
Pick the one that meets your needs. For me it was monitor height since my table is high enough as is so I wanted a low one. Others cannot stand the fugly bezel on this so they opt for one of the alternatives.
Yes the super simplified the stand because the original could actually topple under it's own weight quite easily if not setup "properly". If you did manage to balance it well on the 2 joints, it will sit very low like how I have mine.