The original is attached to the hatch, so it opens nice and wide when the hatch opens.
Looking at Amazon pictures, it looks like Kongka attaches to the sides, stays closed when the hatch is opened.
There's a short video on amazon showing that the Kongka does attach to the rear hatch just like the oem one. The only difference I see is that the OEM as a mesh section exposed when the tailgate is up which allows sight to the interior of the vehicle and also thru to the front to see if anyone is approaching the vehicle. One could consider it a safety feature to be able to see so someone can't sneak up on you while loading the car. I like the mesh so that I can keep on eye on the baby when she's in her seat. Just food for thought.