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problems of AD5933 measure impedance

Hello, I would like to ask whether the solution of cn0349 can be replaced by AD5933 chip. When we replaced the chip, we found that there was a deviation between the calibration results of AD5933 and ad5934, which led to inaccurate measurement of unknown impedance. At the same time, when comparing the ad5933evaluation board, it is found that the resistance of the four bias resistors at the same direction end of the operational amplifier is 49.9k and the capacitance at the output port of AD5933 is 47nF. There is a difference between the circuit here and the cn0349 solution. What is the reason for the difference between the bias resistance and capacitance here.