Xiaomi has now launched its new flagship phone the Mi 11 internationally, having done so in its native China earlier in the year. The YouTuber Frankie Tech has pitted units from both releases against each other in an exhaustive AnTuTu benchmarking test. He has concluded that the 'Chinese' version of the phone held up better in terms of scores, even if it did heat up more in the process.
https://www.notebookcheck.net/A-new-stress-test-video-may-highlight-performance-differences-between-the-global-and-Chinese-market-versions-of-the-Xiaomi-Mi-11.520036.0.html
I guess its the guess its the google play services thats slowing down the global version
China version contain the poisonous spyware that all Chinese must endure therefore suffer some overheat from unhappy Chinese!