Apologise for the delay in replying.
I doubt we are able to choose the international version or the China version of the DX100. I guess if you are residing in China, then you should have no problem acquiring the China version of the DX100. I do know they have a separate department to handle the international version of the DX100. I only found out about this when I had to send in my DX100 for servicing due to a leak on the front cover. I contacted iBasso. They asked me for the warranty no. and when I gave them my number, they said they have no record of such a number So I was requested to send the DX100 together with the warranty card. When iBasso received my DX100, I was told that my DX100 is not the international version and that I should have contacted another department for servicing. To cut the story short, they repaired the DX100 and returned it promptly. Kudos to iBasso for their excellent service.
So is the China version different from the international version? I seriously doubt so. Someone could try asking iBasso directly Below is the inside of my DX100
VisceriousZero and Rolk2, many thanks for your inputs on the sound difference(s) between the DX100 and HDP-R10. Just to clarify, both my units should have at least 200hrs of burn-in each (it should be significantly more). I can't confirm the exact burn-in hours as I do not keep track of the number of hours I operate my DAPs or amplifiers. But I always start with a minimum of 100hrs burn-in before using them. I have compared the DX100 and R10 quite extensively over 2 occasions and could not discern any significant differences between them. The iems used are the FitEar TG!334 and 335DW.
On another note, besides the DX100 having a slightly more powerful amp section, it also runs quite a bit hotter than the R10 during charging and playing at the the same time (37.5 vs 41 deg C). And yesterday, I allowed my R10 to operate for 8hrs continuously after a full charge. The battery indicator showed 50% battery life after 8hrs. Based on this observation, I am quite confident the R10 should be able to last at least 10hrs on a full charge.