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Difference between ADXL325 and ADXL326 X axis Y axis Z axis sensor

My customers are checking the performance difference of the three axis sensors for design the accelerometer.
Is the same performance for the ADXL325 and ADXL326 three axis sensors on the X, Y, Z axis?
Assume that each axis is set to the same bandwidth.
In the data sheet, I seem to have no performance difference on the three axes.
If different, is there a document showing the difference about each axis?
Best regards