The China-France Oceanography SATellite (CFOSAT) carries the world’s first radar dedicated to the detection of two-dimensional wave spectrum, namely the SWIM (Surface Waves Investigation and Monitoring) spectrometer. The radar can scan the ocean surface by rotating 6 different beams to obtain two-dimensional wave spectrum information and set the resolution of the two-dimensional spectrum along the orbit by controlling the rotation speed of the antenna. China and France release L2 spectrometer products with the same software processing, but because the locations of the receiving stations in China and France are different and the input of meteorological auxiliary data sources during ground data processing are not completely consistent, there are certain differences in the L2 products released by both sides, which brings certain uncertainties to the application of spectrometer products. To clarify the differences between spectrometer products of the same version obtained from different data download sources, the latest version of L2 data released by relevant Chinese and French units in March 2024 is selected. The time-matching windows of 5.0 s, 3.0 s, 1.0 s and 0.1 s are adopted to obtain the consistency comparison results of the three main wave parameters of the two-dimensional wave spectrum under different matching times. The results show that the significant wave height is relatively stable, and the accuracy remains almost constant under the spatial difference of the maximum half box. With the increase of matching time, the differences of peak wave length and wave direction become larger and larger. When the matching time is 5.0 s, their difference is about 21.5 m and 46.5°, respectively, while the difference is very small when the matching time is 0.1 s, that is, the product difference caused by the difference of meteorological auxiliary data sources input from different ground processing systems in China and France can be ignored.