Truthfully if they are bred by hog hunters that use them to hunt with and cull to a high standard there shouldn't be much of a difference in them at all except color. But that goes for just about any line of cur dogs..
I couldn't have put it better myself.
I tried like hell to find and raise a good Cat dog when I was younger. It only resulted in me hating the breed for a few years.
Since, I have hunted with a few in the past 10 years or so that has had some exceptional Cats. I know of others that have them and suspect a few more that have some good ones.
I am now convinced that I just never got a hold of the right dog or bloodline.
I have hunted BMC's for over 20 years now and have owned some dang good ones in anybodies book but, I wouldn't hesitate to try a good bred Cat pup if I ran across one.
There is a problem with both breeds of dogs though. The good bred ones can be hard to come by in my experience!