I'd assume that there are many more engineers from the valley on HN thus the votes are accordingly. Look at the sibling comment from danpalmer - he is a Google engineer and thus he has an interest of pushing Google products and trashing open weight models. HY-World is a real 3D model and plays in a totally different league, not Genie 4.

Is it surprising? Looking at the demo videos I can absolutely see why it didn't get as much attention. Not that it's not impressive, it is, but these are in different leagues.