raw from the Q, not demosaiced, channel mixed, tone curved, and then b&w converted in rawtherapee. editing a non-demosaiced image is uhhh annoying. the preview is no help, even the 1:1 zoom is not exactly accurate either.
then, export to darktable, blur tool used on 4px radius, local contrast tool blasted because the image was too flat, trial and error exporting until result is acceptable.

is the end result any different from the demosaiced image? uhhh it's nearly impossible to compare, the second image is all the exact same edits, just with AMAZE demosaic in rawtherapee and the blur turned off in darktable, and it's a completely different result so no 1 to 1 comparison can be made. if anything at all it illustrates how distinctly different these 2 editing pipelines are despite only swapping one module for another.

for fun, same process just without the b&w conversion in rt and with white balance in dt in images 3 and 4