<p>Near-field unidirectional X-ray speckle interferometry is an elegant approach for generating multi-modal images, namely absorption, phase, and scatter contrast. This technique involves scanning random media, such as sandpaper or other suitable materials, in a single direction. The conventional method of generating multi-contrast imaging relies on the correlation of speckles, where one pattern is observed in the absence of an object and another pattern is observed in its presence. In this study, we undertake a comparative study of the correlation based approach with the recently developed moment analysis based approach, delving into their respective strengths and limitations. This comparative analysis serves as a crucial exploration, offering valuable insights that can be useful in the optimization of X-ray speckle interferometry for generating nuanced and comprehensive images across various contrast modalities.</p>