XPOWER METER CRANK ARM:What is the difference between the power meter dual-sided and the power meter single-sided?

The main difference between the two lies in the power measurement method:

Power meter Single-sided : Measures the power of the left leg and doubles it to calculate the total bike power.
Power meter Dual-sided : Measures the actual power of the left and right legs respectively, and can output independent data for both sides simultaneously with higher accuracy.