Using QGIS 3.8.0 Processing > Toolbox > SAGA > Raster tools > Mosaic raster layers, I do not understand the purpose of the Match and Fit parameters.
Here's a screenshot of the Match parameter, with its none and regression options:
Here's a screenshot of the Fit parameter, with its nodes and cells options:
Neither the QGIS nor the SAGA documentation describes the purpose of these parameters and their options. Likewise, an internet search on the topic also turns up empty.
I've experimented with changing the various options, but I haven't found any resulting difference in the output - it is as if the options have no effect.
What is the purpose of the Match and Fit parameters?
When this tools runs, the output log states that it is SAGA Version: 2.3.2 (64 bit)