A few design changes were made in the S10 with the most obvious being the size. The S10 is considerably smaller than the S9 and this allows for a cheaper shipping price.
A not so obvious change is memory. The S10 has more memory than the S9 and I think this change makes the S10 perform a bit better than the S9. People want their S9 to work like a S10 so firmware was written that allows the memory deprived S9 to function in some ways as a S10.
With that said, All of the Openbox receivers and most of the other Ali receivers that are available in North America are made in China under some of the cheapest conditions possible. IMO, you get what you pay for and I have seen several threads of people complaining about issues or problems with the Openbox hardware. I consider the Openbox receivers to be disposable, sort of like a bic cigarette lighter. When an Openbox has hardware problems, it is usually best to throw it in the trash instead of trying to fix it.
if I was going to get another Openbox, it would be a S12. The S12 is smaller than the S10 and its costs reflects what I think the Openbox is actually worth. Look at the top of the page and you will see an ad from one of our sponsors. Look at the price and you may want to consider the S12 instead of a S10.
Another option would be to add about 100 dollars more to your S10 money and buy an Optibox Anaconda. The Optibox Anaconda has more features than any Openbox, plus they are built in much better conditions. The Optibox blind scan is also an improvement over anything Openbox has. I think the Optibox will be available in a week or two here in North America. EB