Where are you located? Find a club near you and go check it out. Both dogs can be evaluated for Schutzhund. Your current dog is more of a mystery but it should still be fun to check it out. He might be into it, he might not be into it.
BH is something that is trained for. Although its a temperament test of sorts...it does take some more difficult exercises that the dog can't really do naturally.
The first step would be to get the dog tested. Get someone experience to look at him work and react to certain situations. That will let you know if you should continue going on with that dog. Even if that dog can't do protection work, you can still do obedience, and if it has the drive for tracking you can do that. The testing process is pretty quick, its just to make sure the dog doesn't show much fear, is interested, and shows the proper drives for the work.
CD RE TC HIC 7/10