Well i am not very keen to continue this discussion. But i would like to conclude that in today’s era, there is no competition any more like there used to be. There are only two companies in the league now for mechanical storage if we discount Toshiba, which are WD and Seagate. And in this situation it reverts back to an oligarchy where only a handful of very large companies are in the league.
You can see this happening with harddrives too. Samsung and HGST (Hitachi) got bought out, warranty got reduced from 5 years standard to just 1 year, innovation and R&D was significantly reduced and basically, they are just squeezing money out of existing technology. There is also no future in mechanical storage; after the PMR drives of yesterday we are getting SMR drives now and after that there will be one more round of HAMR-drives and then it is end of story. Solid state storage is the future.
So the two companies left are not all that interested in competing, they are more interested in reducing competition with each other which is in both their interest, to prevent a price war or competition on other fronts such as warranty and innovation. You as customer do not have a choice any longer, it is either A or B. So do not fool yourself with the idea that the 'market' is in your best interest and a healthy competition is promoting the interests of the consumer. If you believe that, i would argue that you have been successfully brainwashed by big companies or others that promote their interests.