I own both the BW-5 and a DOJ HK-94. When I first purchased the BW-5 brand new from Atlantic Firearms about a year ago, I was disappointed to find that it was having failure to eject problems about once every thirty rounds. I checked and it did have the newest gold extractor spring so I knew it had to be something else. I could have called Atlantic Firearms or Bobcat but I had already filed for an SBR on this gun so I figured I would wait until I had it in an SBR configuration before I worried about it any more.
After the SBR was approved I cut off the fake suppressor, stuck in a complete german bolt carrier group, and installed a german trigger pack and took it to the range. The gun worked flawlessly and I've never had a single problem from it since then. I didn't take the time to find out what fixed the problems I was having ... it might have been related to the bolt carrier, or it might have been the trigger pack, I have no idea.
I only shoot it semi-auto, btw, I know it's easier to get things to work semi-auto than it is with full-auto. My HK-94 has never had an issue, but again, I haven't been using it in full-auto, but I am sure it will work fine.
One advantage of the Bobcat guns is that they are much easier to convert to an SBR since you can just remove the fake suppressor, and they come with the paddle mag release already installed. A german gun will have to be sent to a gunsmith to have the barrel either removed or modified and a paddle mag release installed and then the gun will probably need to be refinished.
Financially, here is how it worked out for me: I paid about $1500 for the Bobcat plus $485 for a german FBI trigger pack, plus about $400 for german internals. Total this is almost $2400 which is about what a DOJ HK-94 goes for today, although the DOJ gun will probably need to be refinished and they don't come with the sweet FBI trigger packs. The conversion of a HK-94 to an SBR will cost a few hundred dollars depending on whether you want a new barrel or just want to cut down the 16" barrel. Converting the Bobcat to an SBR is as easy as 20 minutes with a dremmel, cutting off the fake suppressor.
In the end I guess I would say the HK-94 is probably a better deal at $2400 because the value will probably go up in the future and the best you can hope for with the Bobcat is that it holds its current value. HK-94's are very popular and you can expect that they will only go up in value in the future.