Antutu Benchmark score for Honor 9 Lite is 74,685 and for Xiaomi Mi A1 is 74,998 ( higher the better)
Thus it is clear that both the devices equally good in terms of processor performance are concerned.
Honor 9i also comes with more 4GB RAM as compared to 3GB RAM present in Honor 9 Lite. with more RAM it is easy for the users to use many apps simultaneously without any major lag.
2)In terms of camera performance Honor 9i is a much better device as it comes with a better ( 16 + 2 MP) Dual camera in comparison to ( 13 + 2 MP) Dual camera in Honor 9 Lite. Also, Honor 9i gives new features like Smile detection which is not present in the other device.
3) Honor 9i comes with a front camera flash which is always a better option to click awesome selfies in low light condition.
4) In terms of battery capacity and performance Honor 9i is a much better as it provides a much better 3340 battery capacity in comparison to 3000 mAh in Honor 9 Lite.
Thus it is clear that Honor 9i is a better device.
To check all the other details of comparison you can click this link Huawei Honor 9i vs Huawei Honor 9 Lite