P10 Lite Performance

[Pulserider]

So I have a P10 Lite 3GB version. I did some benchmark tests on it and got for my internal memory Read 149 MB/s - Write 86 MB/s. I have used A1 SD Bench and AndroBench more or less the same results. I have compared this results with my sister P10 lite also the same 3GB version and she get 255 MB/s - Write 92 MB's. It bothers me that the Read performance differs so much. Could this mean something is wrong with my P10 Lite? Or is this normal...