the Brumbaer tool is not just a tool to correct lens fall-off and colour cast issues. So in this it cannot be compared to the "Gain Adjuster" & "LLC" tools or SW features of those appications.
Brumbaer is a SW conducting you through the WHOLE workflow, from capturing through dng conversion, with all the steps being automatically applied: white references for colour casts and lens fall-off issues, colour calibrations, centerfold effect removal and highlight recovery are all steps in the DNG conversion which are conducted automatically, without the user having to care about it.
The important here is that this WHOLE process with all its steps described above takes exactly 13 seconds/image on a MBP 2.33 with 2 GB Ram. If you don't have to apply "White References", then it takes only 3-5 seconds per file.
This makes a huge difference when shooting many images and having to correct all this, then converting to DNG. It saves hours of work.
Nevertheless, the beer is always at hand!
When testing backs side by side I found that most had different sensitivities a the same 100 ASA setting. The Aptus 22 was more than a half stop different than the Aptus 75. The Aptus 75 was not the same as the P45. This can make a side by side test a little more time consuming since it is ideal to evaluate the images with equal exposures. You have to add into this running the Brumbaer tool, the LCC tool, and the Custom Gain Adjuster. You might need to have some beer on hand.