Nothing...I'm just being Nazi-cat-ish here...(and extra grumpy from of previous frustrations)
The hollow-corner 3x3s is never a Maru-name product. It is cube is produced by a company called TWpuzzles and used by Maru Cubershop as the base cube to sell sticker mods (because of the superior "quality" -- in terms of molding precision). Some is also sold as normal-sticker 3x3s.
But unless I'm the ignorant one here....that you have got information that I don't know of directly from the supplier? I think we could only find out if you post pictures of the "version 1" and "version 2" you are referring to...