K3B is the best because it has a larger amount of hardware profiles than correctly detect most DVD recorders. It also allows recording software configured to use in each case. But k3b is not the best option for users who use xfce, by the enormous amount of dependencies from kde.
In Brasero everything is different, in fact you can't choose your recording software for each case. The only way is compiling it yourself with the options you want. An example: The Pioneer recorders along better with cdrtools + Pro-DVD (cdrtools package, supported by slackware), but running with dvd+rw-tools is terrible. Brasero uses the cdrtools software to record CDs, and dvd+rw-tools for DVD, you can't choose cdrtools if your recorder doesn't work with the other soft.
Conclusion: Brasero will work correctly if the recorder is as generic as possible, such as LG, Samsung and Sony. I have a LG GH22NS70 and no problem with Brasero, works perfectly.
FAQ from dvd+rw-tools:
Q. Does it work with my recorder unit?
A. If your unit is MMC compliant, then the answer is "most likely it just does." Well, as the probability of your unit being non-MMC compliant is virtually zero, the answer in practice is unconditionally "most likely." The [core] tools were reported to work with a wide range of drives, including [but not limited to] HP dvdx0i, Ricoh MP512x, Philips DVDRWxx, SONY DRU-x0, NEC ND-xx0, TDK indiDVD 4x0N, Plextor PX-xx, Benq DW00A, OptoRite DD00x, Lite-On LDW-xxS, as well as nonplus units such as Pioneer DVR-x0, LG GxA-40x, Toshiba SD-R112, Panasonic UJ-811, LF-D1x, and not the least all-mighty SW-5582...