I am not a "bushcrafter" per se but I use my knives in the woods/camping etc. I even have carved the occasional crappy spoon. The blade shape of the sar and bj are not that different. By my eye the only difference in blade is a bit of belly on the sar. On the flip side you are getting a much larger handle and for me that is the killer. I have always had two major gripes with my Busse's. One, a choil on everything from a KZ down to the Culti. Ridiculous to me. Jerry has fixed that for those of us who aren't choil lovers. Two, the grip to blade ratios are off on the medium sized blades. I carry my knives and a HUGE grip is more often a reason to be left home. The SJ/BJ have very efficiently sized slabs. For hiking camping this knife will fill a lot of bills. I have a third gripe which is thickness. I have yet to find a really thick blade that actually works well for me. It is funny because what Busse guys (I am a Busse guy btw) find anorexic is pretty thick blades for lots of other makers. Get the LE BJ with micarta slabs choil or no choil and you will never look back. This is a grail type blade (in the store now, yea!) the sar6 is just another very nice Busse. Obviously just one mans opinion but I will now go camping with my NMSFNO, new LE BJ, CABS (best belt knife I own, kicked my meaners, gw's, AD's all to the curb easily), and of course my wife's Banned Buffalo Soldier (gotta go old school sometimes!).
Pete